For my accounts I use 60+ character passwords. After installing CB, these don't work any longer. When resetting the password, I can login again. Changing my password at the frond-end in my CB account back to a 60+ character password works fine. Login out and login in after saving the long password, I can't login any longer. Seems like a bug to me... Or at least a lack of field validation and making Joomla a little less safe. Around the 48 characters is the longest password you can use.

Using Joomla 3.2.1 and CB 1.9.1

Cheers,
Robert

When I installed this Joomla, I started with 3.2.0. I registered my admin with the 60+ char password. Worked fine for weeks, until I decided to install CB. Updated to 3.2.1 in the same session as installing CB I think, not 100% sure. Then couldn't find any solutions on fora when searching for "Can't login after installing Community Builder". Found some about publishing and unpublishing some plugins but they were al good already. Then decided to do password restore. Was able to login again (site and admin). Once logged in at the frond end went to "Edit Profile" and changed the password to the 60+ char one again. Was able to save it. Logged out to try logging in with the long password, not possible. Kept recovering and changing passwords to shorter ones (56, 48, 32) untill I could login again.

EDIT:
The format the original Joomla password is being saved in the DB is completely different to the format CB is using.
Password saved via CB:
$P$DZbKAzEZuxdT0UKm.Zy4y3jKyVnHMH.
Not same password but saved via Joomla:
$2y$10$RRkCmMOAmFpQtU79DX9BLOOWnrSNZlnvSRxMDa0/d0TPu0wSUas1S