When using the 'Search' feature of these forums, if I just try to search by author (e.g. finding my own posts), I get the error listed below.
It appears that it's not picking up the author text I enter.
Here's the search URL in IE6: http://www.dotnetnuke.com/Community/Forums/tabid/795/scope/threadsearch/fromdate/39808/todate/39840/pagesize/10/authors/%20/Default.aspx
And in FF3: 
http://www.dotnetnuke.com/Community/Forums/tabid/795/scope/threadsearch/fromdate/39808/todate/39840/pagesize/10/authors/%20/Default.aspx
Notice the space character in the URL. Also, in FF3, a popup appears stating, "null - null" with a window caption of, "The site http://www.dotnetnuke.com says:". Lovely.
Are you guys aware of this? Is there some other way to search for my posts?
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Server Error in '/' 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: /Community/Forums/tabid/795/scope/threadsearch/fromdate/39808/todate/39840/pagesize/10/authors/ /Default.aspx