Deactivate URL Mangling Code ?

Calling a BSP-Page (e.g. /test/test.htm) WebAS redirects to the same page using another URL (e.g. /test(BD1e==)/test.htm).

I think SAP calls this aditional URL code "mangling URL code" and uses it to store sap-theme parameters etc.

We do not need sap-theme parameters. Is there any way to deactivate these mangling code? Or what does WebAS do with this code? Doesn´t it store all user data in a cookie to handle a (stateless) session?

Thank you for your help.

Stefan