An hour ago I updated to the latest nightly build of firefox, see build identifier below.

As far as I got it up to now they changed the parameters stride and offset in vertexAttribPointer. It counts now in bytes, no longer in floats. Also it's possible that the required size for an VBO is now calculated absolutely wrong, because still counting in floats. However, I have to go more into this...

Does anyone knows where to find an changelog?

Build Identifier:
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.3a1pre) Gecko/20091102 Minefield/3.7a1pre