OptiFine 1.8.3_HD_U_B2
 - updated Natural Textures to 1.8.3
 (20.04.2015)

OptiFine 1.8.3_HD_U_B1
 - added notification for 32-bit Java running on 64-bit OS
 (16.04.2015)

OptiFine 1.8.3_HD_U_A5
 - added option Vignette: Fast = FPS + 10%
 - extended option Fast Render with new optimizations: ON = FPS + 10%
 - optimized AA/AF rendering
 - fixed OpenGL errors with AA/AF enabled
 - fixed border of animated textures with AA/AF enabled
 - fixed window not resizable with AA enabled
 (15.04.2015)

OptiFine 1.8.3_HD_U_A4
 - fixed mipmap handling, especially for HD resource packs
 - fixed entity rendering in empty chunks
 - enabled option Smooth FPS
 - added option Show FPS - displays compact rendering information
 - removed obsolete options Load Far and Preloaded Chunks
 - updated Connected Textures - added parsing of block states (stone:variant=granite)
 - fixed Animated Textures to load textures only when enabled
 (14.04.2015)

OptiFine 1.8.3_HD_U_A3
 - fixed  option Entity Shadows
 (29.03.2015)

OptiFine 1.8.3_HD_U_A2
 - fixed FastMath blocking the player movement
 - fixed block lag on dual-core CPUs
 (27.03.2015)

OptiFine 1.8.3_HD_U_A1
 - fixed Antialiasing and Anisotropic Filtering
 (27.03.2015)

OptiFine 1.8.3_HD_U_A0
 - updated to 1.8.3
 (26.03.2015)
