In VS2008 SP1 our team added a significant new feature: live semantic analysis of open files (or “background squiggles” as we called it internally).  Unfortunately, soon after release we found a few small issues with the release.  They are:

1. Incorrect errors when you open a solution with breakpoints in .aspx.cs files.
2. Incorrect errors regarding conversions of constants in rare cases.
3. An issue importing metadata from some non-C# assemblies.
4. Some timing issues where errors would appear and then disappear during typing or file/solution opening.

We spent some time analyzing the issues, and we’ve come up with a hotfix to address them.  If you’re seeing any issues where you get live semantic errors that you don’t expect, please download this fix and try it out.

Let me know if you find any issues with it!

Thanks!