):1. Configure external file comparator with Muliple-Document Interface (MDI).
2. Open some file comparison in this comparator so that it wasn't closed later.
3. Left pane in TC: usual folder. Right pane: inside zip archive.
4. Synchronize Dirs.
5. Double click on some file pair to open file comparator and change something in right file (i.e. the one from archive). Close this file comparison. Note that file comparator window is still open due to step 1.
6. Alt+Tab to Sync Dirs. You'll see small dialog with two buttons "Close" and "F2 Background". Close is focused so just press Enter. This small dialog disappers (good) and Synchronize dialog appears (bad).
So single hit to Enter actually presses two buttons: Close and Synchronize.
