When using window list mode the text in the command tab is written in German 'Erstellt ....., Letzter Zugriff...'. Also in previous beta.
I just tried to duplicate the problem described above, assuming you refer to the text window column headers. After changing my language from "Deutsch" to "English" and rebooting (language change on-the-fly is not supported yet), I get English texts anywhere, as expected. See the attached image.
Accordingly, I am a bit clueless, since I cannot fix any bug unless I can duplicate it here.
Maybe you meant something entirely different with "command tab" ??
In any case, I am very interested in fixing any bugs, and will examine the other problems described thoroughly (just started with the the locale issue )