When I click on textMate and drag a line that has already been selected down a line, it does not change the focus to textMate. 

I drag the line, hit Command-S (save) and the save panel for Safari (the application I was in, descends). 

If I then click on textMate focus changes and I save. 

If I consciously click on the selection after dragging, it also works.

If I were clever and used Command-Tab (to change apps), control-command down-arrow (to move the line down),   Command-R (to refresh running browser), this wouldn't happen, but I acted like a damn user and did things the wrong way. Just a heads up.