Comment Re:Make it send data to you (Score 3, Insightful) 360
It's called a "report a bug" menu item that automatically compiles as much data as you can think of that might help, including making the user include a description of the bug. Also, there's nothing wrong with just going over to the coworkers desk and working it out. Or schedule a day with the users when you'll be in their "area" to address issues and watch for bugs.
The reality is that most bugs *aren't* intermittent, and if you can fix all the bugs that aren't, then the intermittent ones tend to go away. The remaining stuff is tough to deal with, but certainly manageable.