After entering credentials you may be unable to progress past the 'login' screen, or you may be able to log in, but no map points are listed, or other unexpected behaviour may be encountered.
This is due to the URL rewrite feature which is applied by default to Clientless SSL VPN sessions accessed via 'bookmarks' or the URL browser in the ASA client portal.
EG. In the 'WebVPN' context an example rewrite rule would be:
rewrite order 1 disable resource-mask *.domain.com/* name DataNow'
The smart-tunnel should be configured via ASDM as the 'bookmarks' are stored in XML rather than the running config and cannot be configured from the command line