I'm using Flymake on C# code, emacs v22.2.1 on Windows.

The Flymake stuff has been working well for me. For those who don't know, you can read an overview of flymake, but the quick story is that flymake repeatedly builds the source file you are currently working on in the background, for the purpose of doing syntax checking. It then highlights the compiler warnings and erros in the current buffer.

Flymake didn't work for C# initially, but I "monkey-patched it" and it works nicely now. If you edit C# in emacs, I highly recommend using flymake.

The only problem I have is with the UI. Flymake highlights the errors and warnings nicely, and then inserts "overlays" with the full error or warning text. IF I hover the mouse pointer over the highlighted line in code, the overlay pops up.

But as you can see, the overlay is truncated, and it doesn't display correctly.

Flymake seems to be doing the right thing, it's the overlay part that seems broken.

Do overlays work correctly in emacs for Windows?

Where do I look to fix this?