ZombieKillMan64

Yes, it works fine without Forge. And to clarify I tested it with Forge being the only mod. It also works fine on Minecraft 1.4.7 with Forge v6.6.2.534 and Minecraft 1.4.7 Vanilla.

This problem seems to only happen on Mac OS X, as far as I can tell from talking to other users. I updated the LWJGL to 2.9.0 and launched Mincraft 1.5.2 with Forge version 7.8.0.716 and the game loaded upsidedown. This happens with both Java 6 and 7. Making the game fullscreen with F11 solves the issue only while in fullscreen. Downgrading LWJGL also fixes the issue. Minecraft 1.6 will ship with LWJGL 2.9.0 in the future, so this could pose a problem. I just wanted to let you guys know about the issue. Thank you in advance. Stats: OS X v10.8.3 Java 7 (Macs can use Java 7 for Minecraft with the new LWJGL 2.9.0) Minecraft v1.5.2 Forge v7.8.0.716 LWGJL v2.9.0