Hello,
The latest release of Parenscript fixes a few minor bugs from the previous release (mostly with macro-definition code), but most importantly it gets rid of the (.method object args) method-calling convention/hack. Now method calls are treated uniformly with function calls, so the previous expression becomes ((slot-value object 'method) args). The motivation behind this change is explained on the parenscript-devel mailing list:
http://common-lisp.net/pipermail/parenscript-devel/2009-February/000465.html
Vladimir