Explorer sometimes freezes on 'Recent Documents'

I've installed the new version on the Vista and XP machines and will let you know how it goes.

Using the test dll I've now had a freeze on both XP and Vista, so it looks as if the main bug is still there. Here's the XP entry from my 'TLB Crash Log':

"22-08-2009 23:36 XP crashed when mousing onto Recent Items. Had to restart Explorer. Checked User and GDI Objects after crash and then again after restarting Explorer. No other changes to programs running. Before restart: 1238/3047 respectively. After: 468/1114."

However I may have another clue for you. I found that the following procedure reliably makes Recent Items freeze in Vista and XP:

Start with the Content Filters menu set with 'Apply Filter to all New Files/Folders' selected, and with 'Files mask to hide files' containing desired filter terms (I use ‘*.url* *.wav* *.zip* *.wbk* *.bak* *.ahk*’). Check that it works as expected.

Then re-open Content Filters menu and deselect 'Apply Filter to all New Files/Folders'. After that it freezes the next-but-one time you mouse onto the Recent Items pop-up. Restart Explorer to recover. Afterwards 'Files mask to hide files' is empty - all the selection terms have been lost.

Added by editing:
Another anomaly with Recent Items is that neither ‘Arrange Folders Like Files’ nor ‘Folders Processing’ seem to have any effect. In XP folders always appear at the top of the pop-up in alphabetical order from the top, while in Vista they are always scattered throughout the list.