There are some major issues with IE6 and the solpart menu which I believe have not been resolved.  I've posted about them here and here.

I have been looking for options for a solution to this issue.  My company is B2B, so due to the fact that large percentages of corporations are still stuck using IE6 (I know, ick...) we absolutely need to fix this issue.  The CSS Nav Menu looks like a decent solution, but it seems to be a project that isn't supported anymore by its developers, so I am nervous to go that route.

Also, as an aside, I've been having issues getting responses to my posts.  I know that the DNN community on these forums is not very active, so that may be the issue, but please let me know if I should be posting this in a different forum.  I chose chat about it because that was where the initial discussion of these bugs were found.

Awesome!  It totally worked!  I was wrong, btw, I was not using the SolPart, just the standard DNN menu.