thorium is a fabric mod that fixes 50+ small bugs and annoyances in Minecraft, without affecting gameplay mechanics.
Because thorium does not affect gameplay mechanics, it is not a hard requirement to have installed on the client or the server when joining a server. However, we still recommend installing it on both, since not all issues can be fixed on the server (or client) side.
If you have encountered an issue or would like to request a fix for a Minecraft bug, please create an issue on our issue tracker.
For support, check out our Discord or IRC Channels!
List of fixed bugs
Click to expand
| Mojira Issue | Issue name |
|---|---|
| MC-4490 | Fishing line not attached to fishing rod in third person while crouching |
| MC-6431 | Status effects are lost when returning to the overworld from the exit end portal |
| MC-7569 | RCON output has newlines removed |
| MC-12062 | Hotbar selection resets to the far left when exiting the end |
| MC-35361 | Inventory opening is detected while in Nether Portal |
| MC-46503 | You can retain a mob's shader in spectator mode by running /kill |
| MC-46737 | Spectating entities whilst in third person still applies the mob's shader |
| MC-46766 | Mining a block in Survival, then changing to Spectator creates a breaking animation and sound |
| MC-55347 | Title with long duration shows in other world |
| MC-62997 | Scoreboard overlaps debug screen |
| MC-69216 | Switching to spectator mode while fishing keeps rod cast |
| MC-75721 | Arrow buttons within the book GUI are rendered above tooltips |
| MC-81773 | Bows and tridents drawn in survival/creative/adventure mode can be released in spectator mode |
| MC-84661 | Glowing is considered a positive effect in potion item tooltips |
| MC-86252 | Shields stay blocking and allow left-clicking under a specific condition |
| MC-115092 | Squid/glow squid named "Dinnerbone" or "Grumm" is not upside-down |
| MC-112730 | Beacon beam and structure block render twice per frame |
| MC-119417 | A spectator can occupy a bed if they enter it and then are switched to spectator mode |
| MC-123605 | Debug world still sets clear weather time instead of deactivating gamerule doWeatherCycle |
| MC-123450 | Item frames play sound when item frame item is read from NBT |
| MC-127970 | Using riptide on a trident with an item in your off-hand causes visual glitch with the item in your offhand |
| MC-129909 | Players in spectator mode continue to consume foods and liquids shortly after switching game modes |
| MC-139041 | The sounds of fishing bobbers aren't controlled by the "Players" sound slider |
| MC-143474 | Respawning causes your hotbar to reset to the first space |
| MC-144761 | Animated texture interpolation ignores alpha channel during transition from/to transparent pixels |
| MC-147659 | Some witch huts spawn the incorrect cat |
| MC-147766 | Shift key stays pressed until press any other key |
| MC-148993 | While spectating a player, chunks cannot be loaded |
| MC-159283 | The End terrain does not generate in multiple rings centered around the world center |
| MC-165595 | Guardian beam does not render when over a certain "Time" in level.dat |
| MC-168016 | The sounds of pages in books rustling aren't controlled by any sound sliders |
| MC-170462 | Bad Omen is considered a positive effect in potion item tooltips |
| MC-175622 | Wolf's tail will spin 360 degrees if max health is increased |
| MC-176806 | Scoreboard criteria for using glowstone doesn't increase score when charging a respawn anchor |
| MC-181412 | Removing a jukebox with a command while its playing a music disc, then the music will continue playing |
| MC-184029 | Clicking into the language list does not remove focus from the focused button |
| MC-193343 | Soul speed effect remains after switching to spectator mode |
| MC-195732 | Going through Nether/End Portal while eating food or item causes two food items to be consumed in total |
| MC-201723 | Statistics sprites don't look pressed when clicked |
| MC-202637 | Last sound clip of eating will still play when Players volume is set to 0% |
| MC-206705 | Spyglasses stay in use in spectator mode |
| MC-210318 | Maximum length of book title changed from 16 to 15 characters |
| MC-212926 | Eating while entering a nether portal can auto skip the eating animation |
| MC-215530 | The freezing effect isn't immediately removed when switching into spectator mode |
| MC-215531 | The carved pumpkin overlay isn't removed when switching into spectator mode |
| MC-225364 | Chorus flowers can be shot in adventure |
| MC-227169 | The main hand is broken when you hold a crossbow loaded into the secondary hand |
| MC-227337 | When a shulker bullet hits an entity, the explodes sound is not played and particles are not produced |
| MC-237843 | Players can be idle kicked whilst viewing the end credits |
| MC-244948 | The minecraft:item.bundle.remove_one sound plays even when no items are unpacked from bundles |
| MC-245394 | The sounds of raid horns blaring aren't controlled by the correct sound slider |
| MC-252934 | Placing structures with item frames logs "Hanging entity at invalid position: BlockPosition" |
New bug fixes:
- [MC-62997](https://bugs.mojang.com/browse/MC-62997): Scoreboard overlaps debug screen ([#25](https://github.com/PotassiumMC/thorium/issues/25))
- [MC-147659](https://bugs.mojang.com/browse/MC-147659): Some witch huts spawn the incorrect cat ([#21](https://github.com/PotassiumMC/thorium/issues/21))
- [MC-252934](https://bugs.mojang.com/browse/MC-252934): Placing structures with item frames logs "Hanging entity at invalid position: BlockPosition" ([#22](https://github.com/PotassiumMC/thorium/issues/22))
Removed bug fixes:
- [MC-84873](https://bugs.mojang.com/browse/MC-84873): DeathTime values 20+ cause corrupted mobs
- [MC-145748](https://bugs.mojang.com/browse/MC-145748): Clicking a settings button when there's a slider under the mouse in the next screen plays the click sound twice
- [MC-151412](https://bugs.mojang.com/browse/MC-151412): "Edit Server Info" window does not focus "Server Name" text field automatically
- [MC-233042](https://bugs.mojang.com/browse/MC-233042): Server Address field isn't focused when Direct Connection menu is opened
- [MC-244694](https://bugs.mojang.com/browse/MC-244694): The sounds of goats stomping and ramming aren't controlled by the "Friendly Creatures" sound slider
Other changes:
- Fixed an incompatibility with Shield Extensions ([#19](https://github.com/PotassiumMC/thorium/issues/19))
Removed bug fixes:
- [MC-249054](https://bugs.mojang.com/browse/MC-249054): Closing inventory by clicking outside of GUI doesn't close inventory properly
Other changes:
- Cleaned up the fix for MC-210318.
- ❗️This release fixes an important issue with end generation. All users should update as soon as possible.❗️**
Thorium fixes:
- Fixed end generation not working at all ([#13](https://github.com/PotassiumMC/thorium/issues/13))
New bug fixes:
- [MC-112730](https://bugs.mojang.com/browse/MC-112730): Beacon beam and structure block render twice per frame
- [MC-145748](https://bugs.mojang.com/browse/MC-145748): Clicking a settings button when there's a slider under the mouse in the next screen plays the click sound twice
- [MC-227169](https://bugs.mojang.com/browse/MC-227169): The main hand is broken when you hold a crossbow loaded into the secondary hand
Removed bug fixes:
- [MC-248191](https://bugs.mojang.com/browse/MC-248191): Vindicators' arms are misaligned when celebrating
Thorium fixes:
- [MC-55347](https://bugs.mojang.com/browse/MC-55347): Title with long duration shows in other world
Other changes:
- thorium now includes an experimental config system, allowing you to toggle fixes. The config can be found in the
.minecraft/config/thoriumfolder (config/thoriumon dedicated servers) and will have a GUI editor available in a later update.
- Fixed an incompatibility with sodium ([#9](https://github.com/PotassiumMC/thorium/issues/9))
- [MC-7569](https://bugs.mojang.com/browse/MC-7569): RCON output has newlines removed
- [MC-144761](https://bugs.mojang.com/browse/MC-144761): Animated texture interpolation ignores alpha channel during transition from/to transparent pixels ([#8](https://github.com/PotassiumMC/thorium/issues/8))
- [MC-176806](https://bugs.mojang.com/browse/MC-176806): Scoreboard criteria for using glowstone doesn't increase score when charging a respawn anchor
Removed bug fixes:
- [MC-187539](https://bugs.mojang.com/browse/MC-187539): "tick" function tag runs before "load" instead of the other way around
- [MC-230603](https://bugs.mojang.com/browse/MC-230603): Wolf ears and legs aren't mirrored
- [MC-246257](https://bugs.mojang.com/browse/MC-246257): The horns of some entities aren't mirrored
- [MC-246258](https://bugs.mojang.com/browse/MC-246258): Hoglins' and zoglins' tusks aren't mirrored
- Fixed an incompatibility with sodium-extras ([#2](https://github.com/PotassiumMC/thorium/issues/2))
- [MC-184029](https://bugs.mojang.com/browse/MC-184029): Clicking into the language list does not remove focus from the focused button
- [MC-165595](https://bugs.mojang.com/browse/MC-165595): Guardian beam does not render when over a certain "Time" in level.dat
- [MC-233042](https://bugs.mojang.com/browse/MC-233042): Server Address field isn't focused when Direct Connection menu is opened ([#1](https://github.com/PotassiumMC/thorium/issues/1))
- [MC-249054](https://bugs.mojang.com/browse/MC-249054): Closing inventory by clicking outside of GUI doesn't close inventory properly
Other changes:
- Removed dependency on Fabric API