Visual Studio 2010 RTM has a bug in calculating available memory when developer try and do Cut or Copy text operations.
"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."
A patch available now for it that you can download from:
http://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=29729
More information about this issue and the patch can be found at:
http://blogs.msdn.com/b/visualstudio/archive/2010/06/25/patch-available-for-cut-or-copy-displaying-insufficient-memory-error-in-vs-2010.aspx
Pingback: VS2010 Tips #12: Patch for Cut/Copy "insufficient memory" issue in … | Learn Visual Studio
Here is an article on this topic. Hope it helps
http://dotnetrobert.com/?q=node/240