usb storage auto-mount problem

About a week ago I started to have problems with removable usb drives, both flash and powered. They don’t auto-mount properly at start up and when mounted they spontaneously dis-mount after a minute or so. Everything has worked just fine in my 11.1 installation for 5 months and I have changed no settings. It doesn’t matter what file system the usb device has, fat, ntfs or ext3, it’s the same problem.

I have made the change suggested in post #13 of Mounting USB drives as a user… - Page 2 - openSUSE Forums to <allow_inactive>yes</allow_inactive> but this doesn’t cure the issue.

Interesting that post #18 in that thread stated that “My problems arose about one week ago after some update.” So I also suspect some security or recommended update but I don’t know.

An ideas as to what has gone wrong and how to fix it?

I repeat, usb storage auto-mounting was working for 5 months and I changed no settings, all I have done is apply security and recommended updates and changed from kde 4.1 to 4.2.