Multi-page Toolkit WP 3.0 redirect problem

Hi – I have a problem – when I switched to WP 3.0 something strange happened … plugin seems to work OK, because links like:

http://oclab.pl/arts/motherboard/recenzja-plyty-glownej-asus-crosshair-iv/?page=5

Works …
The problem is when I use links like:

http://oclab.pl/arts/motherboard/recenzja-plyty-glownej-asus-crosshair-iv/6/

I’m getting redirect to main post page:

http://oclab.pl/arts/motherboard/recenzja-plyty-glownej-asus-crosshair-iv/

What’s going on? …