Version 126.96.36.199 is a maintenance release and does not include any functionality delivered by Upgrade Pack 1.
A detailed fixlist is now available:
Lotus Notes Traveler 188.8.131.52 includes all APAR fixes up to and including 184.108.40.206 IF1 in addition to the APARs listed here.
Lotus Traveler 220.127.116.11 does not include features delivered in Lotus Traveler 8.5.3 Upgrade Pack 1 and can not be installed on that release. A separate maintenance delivery will be provided for the Upgrade Pack 1 release.