Here is a list of changes that went into PDT 1.0.3 with regard to XDebug.
1. Support for XDebug 2.0.3 (as some of you know, xdebug 2.0.3 didn't
work properly with PDT 1.0.2)
2. Support for linked files and folders
3. Experimental support for DBGp Proxies (I have only tested with the
proxy available from activestate)
4. Addressed an issue with regards to TCP delays.