[angry-hacker]

Same on Windows + Chrome, scrolling is pain.

I think you should never hijack the default scrollbars of a browser... But a lot of Google products are doing it also so I guess it's a trend now...

[mistercow]

I think it's fine to hijack the default scrollbars so long as all you change is their appearance. If you can't do it without changing the way scrolling via the wheel feels in any way, you need to trash it and use the default scroll bars.