There’s been a couple of reports this week about a mail arriving that looks like it’s from LinkedIn. It’s quite a good fake; unless you mouse-over the links inside it and look at where they go before clicking, you might very well fall victim.
If you do click, you’ll be redirected to a malicious webpage attempting to run Java and (presumably) take over your computer. It’s possible that it also attempts to use Flash and/or other exploits for the same purpose.
If you’ve clicked on this link your computer may be compromised, so please have your computer thoroughly scanned for malware by multiple scanners.