Interesting. I guess I'm lucky they fixed it by the time mine did a daily update. Then again, I tell it to ask me about everything. I happened to miss the OS 2.49? update for the PS3 as well, which had something like a 50% chance of bricking your PS3 once installed.

I've found a few useful tools for those who want to cross-reference suspicious files, or check for false positives:

Many commercial AV companies these days host file scanners on their websites for free, like ESET or Kaspersky, but with these you're only testing it against one source, let alone the tiny filesize limits, 1MB in Kaspersky's case.

So here's some alternatives:

http://virusscan.jotti.org/
-10MB limit, scans files against ~20 commercial antivirus engines and generates a report immediately after upload. Definitions updated hourly

If the 10MB limit is giving you a headache, attach your file and send it to scan@virustotal.com, making sure you put the word SCAN in the subject header. Results will be emailed back, with response time varying with server load. Files larger than 20MB will be rejected.