Comment 3 for bug 778891

Well I now see the scrollbar in fairly widespread use in 11.10.
So I'd consider this a usability bug - as in,
If the function to use the thumb to scroll is available it should be usable for most if not all use cases.
There is no good reason to fade the thumb while it's being used for scrolling in the first place.

If it has to be so then the time to fade should be much higher, the 250ms translates into about 1.5 sec's or so until the thumb is lost and then needs to be re-acquired
This does not account for users who want to read thru text, ect. before scrolling on unless you can do so in around 2 sec.'s or less.