I've started playing with WebGL a while ago, with a Firefox Minefield build and Chrome 5 on Ubuntu 9.10. It worked just fine then, but other projects got in the way and I forgot about it for a while. Yesterday I decided to pick it up again, having upgraded the OS to 10.04 / Lucid Lynx in the meantime, and now I'm getting weird program freezes (mostly the browser I'm using, sometimes the IDE as well, and sometimes the whole system hangs up) when using WebGL. The driver for my ATI cards is fglrx, browsers are still the same. I'm using the CopperLicht library. Sometimes the freezes occur as soon as I try to load WebGL content, sometimes it works fine for a bit and then freezes. When not using anything WebGL related, the system is fine. E.g. Blender works flawlessly.
Any idea what could be causing this?