In System Center 2012 Update Rollup 3 Microsoft reported fixing these 3 issues in Service Manager:
- Memory leak in Service Manager 2012 console when opening/closing incidents
- Service Manager 2012 console crashes with an OutOfMemoryException because of form control objects rooted in the GC heap
- Poor Service Manager 2012 console performance when opening incident forms with the console is open through Citrix
Apparently that was not true as instead of packaging the binaries that are fixing these issues some old binaries were packaged for UR3. Microsoft apologizes for this mistake and it is promising to re-release UR3 for System Center 2012 with the right binaries as soon as possible. The full statement you can see here.