With the newest beta driver, the frontend of MythTV crashes upon start. It resolves certain OpenGL symbols dynamically and thus ends up using libGLESv2. This causes a crash when it calls glGenBuffers().
Reducing it to a simple test case with just a call to glGenBuffers(1, &some_temp) from libGLESv2 reproduces the crash reliably here.
The crash does naturally not happen if Mesa is used-- neither with the test case, nor with MythTV.
Even though I could easily reproduce this with a simplified testcase, I bet I was doing something wrong either and thus, forced the segfault. Strangely enough, though, Mesa did not segfault with the same testcase.
Nevertheless… if you still think it is relevant, I could write a few lines for the testcase. Just let me know.