Ever get the following error on a freshly installed Project Server 2007 environment, hosted in Windows Server 2008 R2?:
"Project Center cannot access the project(s) you are trying to view. It is most likely that you either don’t have the permissions to view the project, another user has deleted this project(s) before you were able to view it or that another user is in the process of publishing the project"
So – one of the new features of IIS 7.5 is that Dyamic Compression is enabled by default.
Generally this is ok – but when combined with Project Server 2007 you will find that your "Project Center" and "Resource Center" webparts will not display anything!
This is a well-known issue – see KB47899 - however, simply disabling Dynamic Compression for the Project website will not fix the issue – you must disable it server-wide, for all-sites on the IIS server.
This is unfortunate if you were hoping to take advantage of Dynamic Compression for large ASPX/ASMX pages from custom applications hosted within SharePoint.
One potential solution would be to dedicate one web-front-end to serving Project Server 2007 requests and disable Dynamic Compression for that server.