When I started Richscrollbar (RSB for friends) development I could not figure out a so difficult programming life cycle.
After all its task is simple, add extra buttons to browser scrollbars to speedup movements inside web page.
Gecko is affect by a bug that reduces RSB productivity dramatically but I’ve created it anyway.
Now I discover RSB totally doesn’t work with Firefox 3 beta 2, Mozilla guys changed API and I suspect introduced some regression.
Obviously it is impossibile to explain the problem to Mozilla, they are so busy to fight against the world.
After some frustrating debug I found the problems and fixed them.
Problem nr 1.
The nsIStyleSheetService.USER_AGENT has changed behaviour without documenting it (at least at this date)
I used USER_SHEET in Firefox 2 but under FF3 the same code simply doesn’t work.
I’ve replaced it with the other flag AGENT_SHEET and magically RSB started to work.
Where can I read the new behaviour? Damned Mozilla 
Problem nr 2.
An horizontal useless scrollbar is always visible only on tab window open at browser startup, if user opens new tab and/or windows this dumb doesn’t appear, sigh!
I found a reasonable workaround hiding the scrollbar inside the notificationbox component.
I hope to publish the fixed RSB on this weekend.
Amazon wish list
