It looks like this:
![](http://puu.sh/lkqD5/dff75cd1d2.png)
It doesn't happen very often, and closing the editor and reopening normally fixes it. Regardless, this shouldn't happen and should still be fixed. I'm sure plenty of others have experienced this too. It's more common in projects with lots of folders.
Clicking the "file" just opens the folder it's in I think, maybe it's seeing . as a valid folder sometimes?