It's not recommended to check-in the modified assemblyinfo.cs file. For a few reasons, including the one you identified: it causes issues with source control related to the build. But moreover, attributes in AssemblyInfo.cs are metadata more than code; in other platforms (like Java) these are always added as part of the build process.

Fixed! The issue was that the subversion configuration was pointing to its local svn.exe instead of the one we had installed on the server. I had to change the 'Path to svn client' field to point to our copy of svn.exe. Thanks again.

I was refering to Strong-Naming. I was using a passworded file .pfx and therefore causing issues, I moved to a .snk file (not password protected) and it's working correctly now.