I was lucky enough to catch the near-footnote mention when I read the Visual Studio 2010 Service Pack 1 patch notes last year, but I’ve noticed quite a few programmers missed it – perhaps still being grief stricken at the loss of one of the greatest feature of Visual Studio ever in un-patched 2010.
Remember to turn on Incremental Linking. (See also: Linker Options that Disable Edit and Continue)
If you find it flaky, try turning on the C/C++ and Linker hotpatch options.
Caveat: It’s not supported for 64 bit.