I get this when I try to log in:
"An Error Has Occurred
Although you've logged in successfully, there was an error retrieving your account's hosting type from the backend system."
After logging into Web mail, Horde says I have used an invalid username or password, even though the page that I am clicking Horde *from* says I am logged in.
Squirrelmail and Roundcube both say IMAP connection broken.
I have the same since a couple days.. I'm on absolut as well
I have sent a ticket about it in the support system, I suggest you do so as well if you haven't yet, hopefully it'll be solved faster if they see more has problem with the same thing.