Apparently, some developpers are having issues when they are doing cut and copy operations in Visual Studio 2010.

The official error message reads like this:

"Insufficient available memory to meet the expected demands of an operation at this time, possibly due to virtual address space fragmentation. Please try again later."

Scott Guthrie himself blogged about a public patch available for this issue which you can download and apply here if you are running into it. More details on the issue can be found on the Visual Studio team blog here.