Insert edge loop gets sticky
This is a problem I thought I understood how to cure, but it seems I've forgotten. It's when the Insert Edge Loop tool does not work interactively, and is frozen in place at the first point you put the cursor, if you slide your mouse the inserted edge loop remains in place until you release your mouse and the edge loop then jumps to the last point you had your cursor.
I just can't remember how to fix this problem.