at net.minecraft.client.renderer.FluidBlockRenderer.func_228796_a_(FluidBlockRenderer.java:413) ~[?:?] {re:classloading,xf:OptiFine:default} at com.infinityraider ...
The OptiFine installer should have a option to overwrite the current OF profile or create a new one with the newly installed version. The current behavior is that optifine ALWAYS overwrites the ...