User birth date field (required for COPPA, optional if you have not enabled COPPA)
Post preview function
Printer-friendly topic view
XHTML templates (~99% compliant, thanks to Allen Ayres of UBBDev!)
"Recent Visitors", a superior implementation of "Who's Online"
UBB Accelerator updated to comply with PHP 4.1.0's new security model
After a reply or edit, you are now taken to your post in the topic
Enhancements to the user search feature (new searchable fields, such as IP at registration, IP at last post, and birth date)
Topic authors may now toggle email notification by editing their post (they may turn it on if off, and off if on)
Private forums may now be set to disallow new topics or replies (previously, new topics and replies were forced 'on')
Added Recent Visitors Wordlet list to control panel
Added email Wordlet list to control panel
Things you should know:
Enabling the Recent Visitors feature will decrease cache use by up to 20%, which will cause a performance hit
Upgrading can be very tricky because there are new variables files and one that has been updated (vars_wordlets_email). Please read the included instructions carefully. Always make backups of your vars files before upgrading.
The UBB demo board on UBBCentral will be upgraded to 6.2 for testing/viewing purposes.