What 15th release? I saw Oct 13th and 14th...I am running the Oct 14th ROM and its pretty sweet...seems like the fastest one yet at least on my particular phone. Change log for the Oct 13th release is in the first post of this threat. Oct 14th change log is on xda-developers copied and pasted for your convenience:
October 14th 2009(Current release):
Added back missing TVout settings
Added busy tone to dialer
Fixed advanced wifi settings
Following have been updated from the latest VGA Tachi ROM
Updated HTC Email setup wizard
Updated Audio Booster
Notification Manager (this fixes a number of things, including the cutoffs in landscape)
Updated RSS HUb to latest Leo version (this fixes the scrolling problem in 6.5)
P.S. I use this app to view my PRL and it will also let you get your MSL code to be able to do manual PRL updates should you so desire...
http://www.baf.cc/bafmsl