Further to this one - the problem started in IE too.

It seems now that all Virtuemart SEF URLs work except for the one for option=com_virtuemart, which is frustrating because it's a Joomla menulink. I've looked at everything I can think of - custom SEF doesn't work, JoomSEF won't create an automatic SEF for it, purged SEFs, cleared cache.

I'm stumped - could it be a bug?

After upgrading JoomSEF from v3.7.2 to current 3.8.1, all Virtuemart SEFs fail on every browser and platform except Internet Explorer. Non-SEF works fine. I've tried purging and clearing caches, but nothing seems to work.

Any ideas?