So what the f**k is AAPL's P/E??
Turns out I was being unfair to Yahoo! in singling them out. This is a generalized industry problem and not exclusive to a few bad sites. Out of the 16 major sites I looked at (2 good ones submitted by readers), only 7 have managed to update their historical financials with the retrospective amendments freely available from Apple's Investor Relations site. Even though 11 do report somewhere the correct trailing P/E ratio, in some cases they still quote a wrong P/E (perhaps derived from their outdated financials) on a different section of the site, or even on the same page. Finally, a couple of sites have simply stopped providing analysts estimates for Apple (Forbes and Yahoo!).
Here's a table with all the sites and data I checked.
Site ttmEPS P/E Fncls Ests
----------- ------ ---- ----- ----
Forbes $ 8.17 28.9 Wrong N/A
CNN Money N/A 28.9 Wrong Ok (incorrect expectations history)
SmartMoney $ 8.17 28.9 Wrong Ok
Nasdaq $ 8.17 28.9 Wrong Ok
Zacks $ 8.17 28.9 Wrong Ok
Yahoo! $10.27 23.0 N/AN/AOk! (fixed as of 4/15, 11 weeks later!)
CNBC $10.25 23.0 Wrong Ok
FOXBusiness $10.25 22.7 Wrong Ok
MarketWatch $10.25 23.0 Wrong Ok
Google $10.25 23.0 Ok N/A
Reuters $37.33? 23.0 Ok Ok (missing March quarter!?)
MSN Money $10.25 23.0 Ok Ok
Scottrade $10.25 23.0 Ok Ok
Fidelity $10.24 23.0 Ok Ok
Ameritrade $10.25 23.0 Ok Ok (excellent tool!)
ft.com $10.25 23.6 Ok Ok
Please add links in the comments for any other financial research site's flawed Apple numbers, or to let me know if any of these have fixed theirs.