Well I didn't see a thread collecting all bug reports (only new ideas), so I post it here (merge it if I'm wrong):

This bug is not harmful at all, more a very small unimportant "problem":
In-game, if you hold down the middle mouse button (mouse wheel) to scroll faster, and right click to see the weapon table while holding down the middle mouse button, you do not scroll faster anymore after closing the weapon table again with rightclick :D

Means in a "timeline":
Holding middle button Holding middle button Holding middle button Holding middle mo
Scroll fast --> right click to open wt --> right click to close wt -> Scroll normal