JoomSEF was working, but every once and a while it breaks product pagination. If I disable JoomSEF and re-enable it is often alright.... for a while.

Lets say I view a category that has 60 items, with 20 item on a page = 3 pages.
If I view page 1 - all is fine.
If I click "Next Page" or the "2" for page 2, I get page 1 again. If click page 3, I get page 1 again.

Please help.

Joomla 2.5.17
JoomSEF 4.5.1
Virtumart extension 3.0.18
VM 2.0.24c

Screen shot

Answered by e-mail.