Mod Compatibility (Shaders2)

Compatible

Better Grass - Works Perfectly
Cheat Mod - Perfect
Random Mobs - Works Perfectly
HD Patcher - Works Perfectly
Optifine - Does NOT work with OptiFine 1.0.0_HD_AA_B2, use 1.0.0_HD_C (or higher) instead. (Be sure to install it BEFORE installing GLSL)
TooManyItems - Works Perfectly
Single Player Commands - Works Perfectly
Millenaire - Works Perfect
Little Blocks - Works Perfect
Zombe's Modpack - Works (Known working: Fly, Cheat, Boom Weild)
Advanced Hud - Works Perfectly
Inventory Tweaks - Works Perfectly
CJB Mods (with XRay) - Works (Known working: Fly, Xray)

    - Works with the default shaders.
    - Does not work with bump-mapping from the alternative shaders folder.

    -Means, in some cases bump-mapping + Modloader doesn't work, there are enough people who have both installed without probs.

Minecraft Forge: Due to new hooks added to Minecraft by Minecraft Forge. Minecraft Forge removes some of the code. GLSL shader's patcher can't find them.
Xray: When opening a save file or joining a server, the game freezes and then crashes. http://www.minecraftforum.net/topic/639823-100x-ray-n-dtdb/
Better than Wolves does not work with Glsl at the time being. Screen goes black and crashes.
Water Shader Mod