Game crashes when scrolling in lobby

Bug description
Inside a channel lobby, when I scroll through the list of rooms by turning the scroll wheel of my mouse or by dragging the scroll bar, CrossFire crashes, that is, it freezes up and the "Send error report" message box comes up.

Steps to reproduce
  1. Start CrossFire
  2. Select a server (UK4 in my instance)
  3. Select a channel (CH5 in my instance)
  4. Scroll down the list of rooms

Notes
  • This is an intermittent bug.It will not be reproducable using the above technique every time.
  • The bug seems to be more likely to happen when I have just played a game, go back into the channel lobby and start scrolling
  • Using the mouse wheel seems to cause it more often than using the scroll bar itself

Scenarios
There are two execution paths that occur when this bug takes effect:
  1. 75% of the time, the events listed in the description above will take place, ending with the "Send error report" message.
  2. 25% of the time, the error message will not come up in the foreground. Rather, the frozen CrossFire client will stay in the foreground, and the error message will appear behind the lobby. I can switch over to it using the ALT+TAB key combination, at which point a different message comes up (the following is a rough approximation, I don't know it by heart): "File missing: Shader File "somefile.rez" is missing"

Conclusion
This is extremely annoying because it forces me to re-start the game every few minutes. Yes, of course I have tried restarting my computer, uninstalling and reinstalling CrossFire and so on, but the bug persists. This support forum thread may possibly be about the same problem.

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