Re: HP TRIM Site Collection Integration settings - Request for Grid failed error
Regarding the "request for grid columns failed", this is typically an issue authenticating to TRIM. Depending on whether you have SP with NTLM or Kerberos, the web.config for the site should be updated to Windows (for Kerberos) at the hptrimbinding. Section 4.2 (page 63,64 in the 7.2.1 SPInstall manual).
The other issue could be the bindings you have for the sharepoint site in IIS. If you have more than one (such as the machine name and the url, remove the machine name. If the authentication is correct, it seems to have an issue authentication when there is more than one binding.
If you look in the Windows App event logs, you might find a warning from ASP.NET that "This collection already contains an address with scheme http. There can be at most one address per scheme in this collection."