oooooh!.. So close, but still no banana...
  I just installed the 1.3.1 files, first without the SMF login, then with...  The results (ouch!).
  First of all, it looked good, went in well and I can see there's been improvement in the logging in.  I am staying in the side (mambo/vb) that I do the login on (this is good), even though I make a brief visit to the SMF side (complete with an error I will describe below) before shooting back to the Mambo side..   This is "without" the SMF login module....
   Logging off on the Forum side still gives me a "unable to load the 'main' template", and "stack overflow at line:144" errors, but I am logged off, and thats a good thing. (oh, after clicking the Ok on the MS error)
   Logging on the Forum side did NOT log me on the Mambo side however... (boo!)

-  Installed the SMF login 1.3.1
   Fairly nearly the same events as described above, with the addition of when I log in on the forum side, there is a "logout" box on the Mambo side, but I'm really not logged in properly (ie.. no admin menu items, edit features on frontpage etc.. ) -  If I click the logout on the Mambo side, I'm shot to the SMF side and there's a box saying, "Verification error, try again.. etc.. , that sort of thing"  But I AM logged out of both sides and do return to the Mambo side..

    Logging in on the Mambo side with or without the SMF login module gives me a brief visit to the SMF side with an error in red, that an error has occured (I see a box with my name, but no password, and a 60) - then I shoot back to the Mambo side.. Logged in on both sides as I should be.
    Logging out on the Mambo side gives the "unable to....  Stack overflow, error I described before"

     Installing, I still had to manually edit the config file to get the install to finish (had to manually enter the absolute address thing) - I noticed that the Mambo prefix (that used to be grey) is gone.. thats a good thing I suppose, and it shows work has been done..

     In short though, "close" but not quite smooth....  I do now stay in the side I logged in on... and thats a good thing... But I sure don't want users to see errors... arrrrgh!

hi, admin.

giving you access to one of my servers is no prob. but they do not (re)produce every prob mentioned here. i took a look in your code, but didn't get the prob: switching from login2 to login. but if you need access, just ask!

tucker