I have the same problem, I have the following setup:
Joomla: 1.5.15
Wordpress Component: 2.8.6
JOOMSef: 3.5.1
I installed the WordPress JoomSEF 3 Extension
Looking in the list of extensions, I see the following:
Components without SEF Extension installed
Polls - - Component's router Open parameters
RSform!Pro - - Component's router Open parameters
User Manager - - JoomSEF default handler Open parameters
As your recommendation, I have searched the forum, I have also searched the downloads, as a paying customer, I just expected to be able to install the extension and for it to work.
Appreciate any help.
Thanks