I have installed a fresh-from-the-zip copy of MODx 1.0.2 on my webhost and clicking system config gives a blank page. It stops loading, simple as that. I’ve considered various possibilities and maybe the [shared] server is running out of memory? I have 24M to work with and every page other than the configuration one seems to be working.
edit: I changed host and now everything is working great and snappy. I was probably running into the 24MB limit mentioned above.