Please have a look at www.alusign.pl
I have just installed joomsef virtuemart there.
Problems are when..
i write some definition in search box (which is on top roght) ... for ex. "flash"
After the results are shown i click on one of them... and... error

Another part.. i want to change the amount of products to be shown or page -> error
I want to click on the "next" page of products like here...
www.alusign.pl/dystanse-tabliczkowe.html
Just click "next" polish language "nastepne" same error.... everything was ok without joomsef plugin..
I have realized that, the problem comes allways when the end of www is not html like

.../bla-bla-bla.html?limit=20&limitstart=20 instead .../bla-bla-bla.html

Is it possible to fix it in Joomsef menu or next Jooomsef updates?

I have:
Joomla 1.5.18
Virtuemart 1.4
Joomsef: 3.6.5
Joomsef VM plugin: 2.0.20

Please HELP!!!!