Andy_Langton - 10:22 pm on Jun 6, 2012 (gmt 0)
The password are very weakly encrypted (no salt) and can be easily obtained if they are short or not sufficiently complex (a matter of seconds to decrypt a 5 character password, for instance). There are actually pointers in the file that around 1/2 may already have been decrypted.
I checked the file myself, and it did indeed contain my password, which was unique to LinkedIn. Many others have reported that their unique/randomly generated passwords are also in the file.
Anyone with a weak password, particularly one that is used elsewhere in association with their email address or name should change their passwords ASAP.