I used to speed up the keyboard repeat rate via
# xset r rate 200 75
When I moved from Xfree86 to X.Org (SuSE 9.2 current FTP version), the behaviour changed:
Now when pressing a key, it waits 200 ms before it starts repeating with a rate of 75 (as before), but after about 25 repeated characters the repeat rate slows down abruptly.
Is that a new undocumented feature?