(FOSS,malware,security) Does open source software enhance security?

The article is a little old, but it's a good read nevertheless. Explains nicely why Unix is more secure than Windows. Not as funny as usual articles from The Register, although the author clearly tried to redeem that by the time he came to the last para:

Does open source software enhance security?

"So, while openness provides a couple of security advantages in itself, the chief reason why Linux and BSD offer superior security is not so much because they're open source, but because they're not Windows."