What made the old versions of the bitcoin wallet insecure? According to the downloads for the Bitcoin client, versions older than ~0.3.0 were "insecure".  Since they are not available for download (and the lack of security is the given reason) no one can learn from them or verify the reason.  

The question I have is, 1, does anyone have a copy of the original wallets and or their source code for download and, 2, does anyone know what made them insecure?
The source code for old versions is available in the Bitcoin-Qt Git repository. Click on the "branch: master" button and then select "Tags", and you can go all the way back to v0.1.5.