[imp] patched horde to 3.1.1 - cannot log in

[Josh Trutwin]

I just ran the 3.1 to 3.1.1 patch on horde and now when I log in I 
don't get redirected to imp.  I did the ALTER TABLE on the session 
table (mysql) as recommended in the UPGRADE doc.  I notice that in 
horde_log it shows login as being successful, but I just do not get 
redirected to the mail page.  I cleared my session table as well and 
that didn't seem to help.  Basically I hit Submit for on the login 
page and it always stays on that page.  If I reverse the patch all is 
well again.

Any ideas?  Gotta be something stupid I missed.  Thanks,

Josh