Otaku, Xtazy:
Try this.... search for the phrase (by using ACP => Languages & Phrases => Search In Phrases) named "requiredfieldmissing" (click on the option "Phrase Variable Name Only") and you should see a default value of....
Code:
Content visible to verified customers only.
Click "Edit" and enter a translation of...
Code:
Content visible to verified customers only.
... so that the double quotes are removed.
Let me know if that works for you (it worked on my site just now); if that works I'll forward this thread to Michael as an item to fix in the next release.