IE8 bug: default accelerator for translations Live Search in arabic-english

I've just upgraded from IE7/Vista SP1, x86, ITA to IE8.
Everything works fine except one thing: IE8's Live Search accelerator to tranlsate text is in arabic-english as default instead of the expected english-italian. If I change to english-italian settings won't be saved.

If I use InPrivate browsing or disable Protected mode it's ok instead.

This problems has been already reported by other users some months ago with the betas: Microsoft Translator Official Team Blog : IE8 Beta 2 - Translation Accelerator

Solved!
Have had to delete EVERYTHING from Tools/Delete Browsing History, EXcluding only first checkmark option!
Deleting cookies more and more times was not enough!