I've found on a couple of occasions that after using Sudocue heavily, my Scrollwheel [middle button] double-click stops working outside the program. I don't know if it was a fluke or a problem unrelated to SudoCue but I thought it worth mentioning in the event that others also experienced it.
Support info:
Windows XP Pro SP2
Logitech Classic corded mouse in ps2 port
Logitech mouseware Driver 9.79