Microsoft Visual C++ Runtime Library - Rumtime Error!

Hello,
I am having trouble with a strange bug I have not encountered before, below are some of the details and an image of the error dialogue box.

  • Only occurring in (shock!) Internet Explorer (versions 6, 7 & 8).
  • Not occurring consistently: Sometimes crashing after a minute, sometimes hours, sometimes not at all.
  • Not occurring in response to any particular event. If I go to the site sometimes it will crash without interacting.
  • The site uses Papervision but I have built PV3D sites before without a problem.
  • CPU Usage is not particularly high, using about 40% on most new machines.
  • Tested on Win XP machines only, I think…

Any guidance would be appreciated, I have been google-ing for hours without finding anything of note.

Thanks,
Elliot