did a quick search but couldn't find this issue posted yet. so here goes...
i have another thread opened for a clientless portal customization problem in 8.4.5 and was, let's say, gently guided, toward upgrading to 9.X to solve some of these issues. well, I found one in 9.1.1 now too.
the attached image shows that the portal page title panel text customization is being placed into the applications area's banner/title/header section. don't know if this occurs in 9.0 or 9.0.1 because i just noticed it today on an ASA5505 that i just upgraded to 9.1.1 that had NO webvpn config on it at all. i even did a revert webvpn all to clear out anything that might have been there, built a new customization, and it's still doing this same thing. can anyone else confirm this?
Confirmed as a bug on 9.0.1 as well. I built an SSL VPN from scratch and got the same results as you did.
Looks like reopening the TAC case is in order.