> I couldn't go back to English in the little drop-down at the lower-left corner
did you create your translated page by the translation-tab ("create" button), or by clicking on an untranslated page in the sitetree? did you still have the problem after a full page-refresh? trying to figure out if the dropdown was properly populating by ajax, or if the language wasn't actually saved on the serverside

> The translation tool doesn't respect the Accept-Language
interesting, didn't know about this header - i've added a ticket: http://open.silverstripe.com/ticket/2231

Ingo - thanks for creating the ticket.

Regarding backtracking my steps, sorry but I don't remember. I would argue for the AJAX refresh being delayed though, as the translations were persisted correctly and were available shortly afterwards. I didn't try the immediate full reload at the time, though.

> I couldn't go back to English in the little drop-down at the lower-left corner

I encountered the same problem. When choosing English in the drop-down menu sometimes the site-tree does not refresh. Occasionally (can't figure out why) an Ajax error is occured when clicking "save&publish" the translation and the links in the site-tree stop to react. You have to refresh to go normal state. Though the content is saved and published properly.