Microsoft Dynamics CRM 2011 Compatibility With .NET 4.5

I have been doing some tests lately and have had a lot of luck recently with .NET 4.5 being compatible with Microsoft Dynamics CRM 2011.  I haven't run into an unsuccessful scenario yet but I am wondering if anyone else in the community has.

According to this KB article it seems to be compatible since Update Rollup 8:
http://support.microsoft.com/kb/2669061

Here is what I have tried so far and all of these worked:

- Creating applications that talk to CRM compiled in 4.5 that reference the 4.0 assemblies included with the SDK
- Registering 4.5 compiled plugins using the plugin registration tool (also recompiled to 4.5).

Interestingly enough my 4.5 plugin fired successfully even though .NET 4.5 wasn't installed on the CRM server.  I am guessing it only is required if you are using the new functionality included in .NET 4.5.

I am wondering if anyone has found anything that doesn't work so far?  Let me know!

-Happy Friday!