I have the same problem
Starting from the mysqld.exe --console from the command line gives the following results
C:\xampp\mysql\bin>mysqld --console
090812 21:01:32 [Note] Plugin 'FEDERATED' is disabled.
090812 21:01:32 [Note] PrimeBase XT (PBXT) Engine 1.0.08 RC loaded...
090812 21:01:32 [Note] Paul McCullagh, PrimeBase Technologies GmbH,
http://www.primebase.org
090812 21:01:33 InnoDB: Started; log sequence number 0 46409
Can't start server: listen() on TCP/IP port: No such file or directory
090812 21:01:33 [ERROR] listen() on TCP/IP failed with error 10013
090812 21:01:33 [ERROR] Aborting
090812 21:01:33 InnoDB: Starting shutdown...
090812 21:01:34 InnoDB: Shutdown completed; log sequence number 0 46409
090812 21:01:34 [Note] PrimeBase XT Engine shutdown...
090812 21:01:34 [Warning] Forcing shutdown of 1 plugins
090812 21:01:34 [Note] mysqld: Shutdown complete
I would imagine that TCP/IP would be active as I have no problem with internat access.
Before upgrading to this latest version I needed to start mysqld.exe directly. It wouldn'd start from the control panel or the batch file.
Regards
Dennis.