The links that the FBA pack adds to the Site Settings page causes an error on the page, due to the links having the same ID of 'FBAUserManagement'.

This is specified in the xml file, Elements.xml, found in:

SourceCodeProjectRoot\FBAMenus\Elements.xml

Not convinced this is causing an error for everyone, but it did for me and fixed it after I changed the ID's.

Cheers,
Bav