Steps to reproduce were: * Change File Browser display mode to fullscreen in Preferences * File > Save As (make sure existing .blend is selected) * File > Open The file name would still be shown in red and the + and - icons would be visible, which should only be the case for saving files, not opening. Note that this change makes all `FileSelectParams.flag` values be reset on re-opening a File Browser, which *may* in fact cause other issues. It's easy to fix those though, and I'd prefer properly resetting the flags and only keeping specific ones in that case.