Woah, glad to know that I'm not the only one, hopefully this will be fixed.

I think the problem is on SE end, because the problems started after the 2.3 patch, I was playing just fine a few days before. I uninstalled the beta drivers and went back to the latest stable, but the game still randomly crashes (more often when I try to teleport). I was doing Crystal Tower and after the 4th boss it started to stutter a lot.

OS: Windows 8.1 Pro 64 bits (updated with everything from Windows Update)
Drivers: CCC 14.4 (latest stable)
CPU: Intel i7 2600K
RAM: 16GB
GPU: 2 x AMD Radeon HD7970

I'll send the bug report to AMD too, just in case.