I confirm this. Recently when upgrading my scite editor from sid I pulled in gtk 2.8, and painting generally feels an order of magnitude slower, which is especially noticeable in scrolling. When I did a custom build of the same scite version for sarge and downgraded libgtk back to sarge version the problem went away.
I think this bug should be higher severity than "normal". -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]