Game allows several illegal moves

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What steps will reproduce the problem?
I made several illegal moves.
1. I made Castling while the king was under atack.
2. I made Castling after the king was moved and went back to his position.
4. I made Castling several times when it can only be made once.
3. "En passant capture" can not be made.

What is the expected output? What do you see instead?
http://en.wikipedia.org/wiki/Castling#Requirements
http://en.wikipedia.org/wiki/En_passant

What version of the product are you using? On what operating system?
http://gerculanum.appspot.com/gadgets/com.example.chessgadget.client.ChessGadget
.gadget.xml
Windows XP im using.

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 9 Mar 2010 at 11:48