There seems to be an issue with config.vb in the AddCodeSubDirectory function that doesn't allow for a namespace on the configuration element in the web.config. This problem occurs when trying to install the Survey Module and the Reports Module.
Edit your web.config, and if you see this line
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
try replacing it with
<configuration>
Note: I'm not sure if this breaks anything else. I don't think so, but do this in a test environment.
Thanks
Tim - www.portaldesigns.biz