Compatibility Orcas - VS 2005

After a bit of research I found that there are some compatibility issue between Orcas and VS 2005. 

• Client side VS add-ins will need to be recompiled (or have policy changed) because the TFS OM assembly versions will change and add-ins will need to bind to the new assemblies.  The APIs themselves are generally not changing, so we don’t expect much in the way of code changes – just recompilation.
• Build is the only area where we plan to have some compatibility disconnects.  In general, most build operations - listing build definitions, starting and stopping builds, examining build reports, etc. will work both with 2005 client -> Orcas server and Orcas client -> 2005 server.  However, here are a few caveats:

1. 1. An Orcas TFS server will only work with an Orcas build server - so you'll need to upgrade your build server when you upgrade your TFS server.
   2. For an VS2005 client to start a build on an Orcas server, the build definition needs to be stored at $/<TeamProject>/TeamBuildTypes/<name>.  In Orcas, you have more flexibility as to where to put them.
   3. Changes made to properties in the .proj file that are in the database in Orcas will not be updated in the database and will no longer be in sync.
   4. VS2005 will be able to start a build, but it can’t queue a build, see the list of builds in the queue, see the list of build agents, etc.
   5. An Orcas client will not be able to create a new build definition on a TFS2005 server.
   6. When starting a build, an Orcas client will not be able to change any parameters in the dialog for a TFS2005 Server