A Better Mouse-Fix the Left Button!

fizbin asks: "Every mouse I've ever had a chance to use for a long enough period of time (from cheap 5-dollar two-button specials to brand-name Logitech three-button things to those Sun optical ones that need the special metal mousepad) has developed the same problem: the first button (and I guess others as well, but I notice this on the first button) begins to slowly stop working. It lets up even if I keep my finger down. This makes it a royal pita to drag anything from one place to another (since what you're dragging gets "dropped" when the first button lets up), and makes using certain menus (such as the ctrl-button menus on xterms) almost impossible (since I can never keep the button held down long enough to drag down to the item I want). Is this expected behavior, and should I simply plan on replacing my mouse every six months? What about common computers (in labs, etc.) -- should they budget for replacement mice on a regular schedule? Is there some brand of mouse that avoids this problem?"