I'm wondering why people are having font problems. If the video resolution is properly set in the subtitle file, they should automatically resize with the window size.
Also, I'd like to point out that the Media Player Classic people are talking about has nothing to do with Microsoft or Windows - except for running on Windows only, that is. It may look like Windows Media Player 6.4, but "under the hood", it's a completely different application. Therefore, saying Windows Media Player Classic is completely wrong.
Anyway, I agree, anyone should be using MPC-HC with CCCP - and possibly CoreAVC for H.264.