OC 184.108.40.206, Journal2 2.7.4 theme, SEO Paladin manager.
The problem is descriped here : http://forum.opencart.com/viewtopic.php?f=99&t=167780
The solution now at this moment is to empty the table url_alias, then change/add what needed, and then run SEO url within SEO Paladin again. Front then works fine. Only in the back admin, in the data-tab in Products, no data available.
So, there is something wrong, have removed extensions, Vqmod, and so on and so on, but the problem stays.
We need help for this problem, because the work-around is not really the solution .
Please send PM for details.