XPHomeSP3 with MSExcel version 2003 (current patches) I know, old o/s and ancient app, just throwing it out here in case it's useful.
EDIT: ***Only seems to be happening with Windowblinds running. Tried it with Gloss Black loaded and Polaris loaded, crashes on both. Doesn't crash after unloading Windowblinds via systray unload.
Enable WinFX4 Config HomeTab "Add additional options to the window right click menu".
Go to Excel window titlebar right-click menu "Window maximizing control".
Select anything other than "Always maximize to normal size".
Causes Excel to crash when clicking on the Excel window maximize button to execute the alternate maximized size. (crashes hard, exel.exe process just disappears from task manager)
Double-clicking on Excel window borders to resize works fine. Right-click "Window size control" resizing works fine. No animations enabled (XP).
Liking it in general. Resizing enhancements are quite handy. Multi-monitor flash video fullscreen control in itself is worth having it installed.