Hey Chris:
I've found two issues, one of which is reported here. Whenever you hit 'save' on *any* page, you get the desktopdefault.aspx error from DNN2. So this happens *everytime* a page is saved and I know of no workaround.
The other error is much more of a show-stopper. Once you create a wiki link (like [[wikipage]], and click on that link, you can type in some stuff. However, you have to hit Save to save it, right? Well, as soon as you do this, you get the error above, of course. So you hit the back button until you get to a page that manages to display the wiki page, instead of post issues. ONCE YOU'VE SAVED THE PAGE and want to click on that page again, you receive an error. That page is now gone. So essentially, one cannot create more than one page for the whole wiki...because as soon as you try to save another page, when you click on the link for that page, you get this error:
Server Error in '/DNNC2L' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
Requested URL: /DNNC2L/DesktopDefault.aspx
So the upshot is, one cannot use this wiki 'tall. So unfortunately, I've removed it from my module list. I'll have to find something else until these basic 'show stoppers' can be made public.
Using 4.0.3, IE6 (or Firefox 1.5)...