To reproduce: go to a profile (for example, http://area51.stackexchange.com/users/9549/lesspop-morefizz). Scroll down to example questions and either change pages or sort tabs.
The URL in the address bar of my browser then ends up looking like this:
http://area51.stackexchange.com/users/9549/lesspop-morefizz#ppage_1-ccpage_1-fcpage_1-fppage_1-epage_1-psort_Model.Sort.ToString().ToLower()-ccsort_Model.Sort.ToString().ToLower()-fcsort_Model.Sort.ToString().ToLower()-fpsort_Model.Sort.ToString().ToLower()-esort_votes
The sort isn't broken and everything appears to work, the URL itself is obviously not right.