I have some major problems in IE6 when including NGG images in posts using the singlepic tag. The images appear tossed around at seemingly random positions on the page, and sometimes even way outside of their actual post. You can see some screenshots of what it looks like here and (view of post from the frontpage) here (within a post). Reloading the page typically scrambles the image position to another position.
I've tried changing thumbnail effects (lightbox, thickbox, shutter, etc), but it does't make any difference. I've noticed no problems with IE7, Opera, Safari, or FF / Mozilla (but unfortunately 20% of my visitors use IE6).
For reference, I'm running WP 2.5.1 with the 3-column K2 theme (the leftmost column being the content column, with two sidebar columns to the right). I'm also using the provided K2-style in NGG.
Has anyone else tackled similar problems?