WordPress for BlackBerry BETA has just recently got an update.
The BETA has been updated to 0.9.0.121.
List of fixes:
Corrects a problem with some self-hosted WordPress sites with version < 2.7
Fixes an issue with WordPress installs in subfolders
A few spelling / copy issues
Also fixes this issue #31 (Categories badly formated) ? WordPress BlackBerry App
Download the upgrade HERE
WordPress for BlackBerry Forums
Forums for wordpress.