Anybody else find it a UX blunder when you want to click the top of a tabular list (e.g. my emails in Thunderbird, or most other clients I've seen) and you accidentally click just above the first entry, on the column heading bar, which then sorts the content by that column resulting in lots of blue air & a flurry of clicks just to try to get back to where you were before? There should be a much smaller target for 'sort-by-column' in most scenarios. Or perhaps a 'lock sort-by-column' button...