No, I don't.
Does this happen only with uddeIM (don't think so because uddeIM does only use standard Joomla calls like all other components).
It sounds like a wrong configured Joomla. Or you don't have cookies activated in your browsers config.
When you find the problem, please give feedback since this is new for me.
uddeIM & uddePF Development
CB Language Workgroup
CB 3rd Party Developer