In FB5 when you use the mouse to click on a build action and put a breakpoint in, it's pretty touchy for removing the break point. You can't click on the icon itself, you have to click in the little whitespace to the left of the icon between that and the splitter. The F5 works fine of couse, but I'm pretty sure that in FB4 you could click on the Icon itself and have it toggle the breakpoint off. I thought it was broken the first couple of times I used it until I realized you couldn't click on the Icon to remove it.
Thanks,
Rich Werning
TIP Technologies, Inc.