see screen shot. Mac OS X 10.3.9 version 1.5 Beta 2 (20051015)
Created attachment 199647 [details] "Find Updates" is executed. All messages of the execution result are not displayed. This is the same also in Firefox1.5 branch build.
I noticed this while testing Thunderbird RC2. When an update for a theme is available, the "Find Update" button is also cut off in the UI.
Created attachment 357917 [details] screenshot Seems like a WFM ever since the new Add-ons Manager landed on TB 3.