Ironically, the OpenGL port is actually more stable than the Software release.
I herd it was buggy out the wazoo and had tons of graphical glitches, especially in ERZ2. Also, netgaming with it screws with servers, especially if the host is using it, due to SRB2 2.0 not having it as a standard feature and most users using software. I'll just wait till it's fixed up (if it ever is).