Does 5.1.889 have this problem? http://forum.avast.com/index.php?topic=69049.0.
Unfortunately treehawk hasn’t replied regarding this since Jan. 11. I don’t know about the freezing but I am still unable to properly eject a USB portable drive. Doesn’t really answer your question but if you need to use USB connected devices there may be some difficulties.
Thankfully I have had no probems to properly eject a USB portable drive neither Flash drives nor my USB External HD.
I make sure that they are un-used by closing ALL Windows referencing them before trying.
http://www.ehow.com/how_4784537_remove-usb-flash-drive-computer.html
I haven’t got that problem, freezing or unable to eject USB on either desktop with XP Pro or my netbook with win7 starter OSes with 5.1.889
http://forum.avast.com/index.php?topic=69367.0
Still some problems with it for some people.
I have the USB-problem, too, since the last version!
I can’t unable/eject my cardreader (with SD-Card inside).
I never had such an USB-problem before!!!
I have no problems with inserting nor with removing USB devices on neither the desktop listed below nor my laptop with W7.