Flaky Dragging and Dropping of tags

[Dougie Nisbet <dougie highmoor co uk>]

Is it just me? I've noticed with no discernible consistency that 
dragging and dropping tags is flaky. Most of the time it's fine, but 
sometimes, usually when dragging a tag from one parent to another, that 
it takes a few attempts. Usually I assume it's because I'm being lazy on 
the mouse but sometimes I just can't get it to work at at all, and end 
up using 'Edit Tag' (and all the scrolling that that involves) to put a 
tag into the right place.