I'm sorry to hear that you're having this issue.
Unfortunately, I don't have a copy of 2.20. I'll be happy to send this up to the appropriate department.
Made the mistake of "upgrading" my firmware from 2.20 to 2.31 when I was having no issues. Since then, our Clone Wars Season 1 set "freezes" when it is loading the menu. Same happens on each disc, yet everything else works fine. At this point, we have already cut back on our Blu-ray purchases as a result. It would be a gross understatement to say my wife is displeased with me for this. Is there any way at all to get 2.20 back?