Session return variable stored incorrectly with SEF Enabled

[masters1333]

Regarding the problem with Firefox returning to the page where the user logged in or out from incorrectly http://www.simplemachines.org/community/index.php?topic=89339.msg588166#msg588166

When SEF is enabled the Session stores the return URL as

Code Select Expand

.../component/option,com_smf/Itemid,36/type,rss;action/

When SEF is not enabled The Session stores the correct URL and the log in/out function works properly.

My question is what could be causing the return url to be stored as such and is there anything I can do to try and fix this.