2.6 has some cool new features.
The biggest amongst them being tha ddition of a detailed balance tracking sytem for patient balances.
Additional tweaks were made to speed the database including a transition to innodb tables in mysql. Additionally more sql statements have been tweaked to increase speed.
I added the "next" appointment to the bottom right of the encounter form.
DOB is now displayed on the Patient search results
Added a patient alert/notice field on the patients data form that also displays on the schedule, so you can stop putting all that kind of stuff in the last name ;)
I cleaned up the week view, and added a print version of the weekview.
Lastly you can re-access the encounter form printout at any time by viewing the record associated with a visit.