When C# program is running in Water and hits an exception (not in the project’s code), the call stack tree is shown and source (if available) in the editor. If I choose to switch back to the Project Tree, the last file I was working in is still highlighted in the Project tree, but the editor is still showing the source code that caused the error. Clicking on the same (already highlighted) source file does nothing. I have to click off of it, to move the highlight away, and then back on that source file to view the source in the editor.
I hope I explained that clearly.
Not a big deal really, but just a little annoyance.