[andrew-lucker]

MD5 is good enough to prevent most random collisions. The problem is when you need to prevent intentional collisions.

[innocenat]

As a note, even CRC32 is enough to check most random collisions.

[aylons]

I actually thought of using CRC32 when developing my first system, but I preferred MD5 because it would be easier and clearer for people to check file integrity in a *NIX command line.