Jason the following note is on the Setting up a testing server article:
Note from WebAssist: "Current versions of xamp use php 5.3. we are upgrading our software to be compatible with php 5.3 at this time. For now, our software has been tested using HP 5.2.10, we will be able to support 5.3 soon. - 10/05/09"
Is this still an issue?