Google on Sunday started detecting TwitPic.com as a threat. Currently, if you try to access the site from Google.com using any browser (link), you’ll get a malware warning.
Furthermore, whenever you use Google Chrome, TwitPic.com pages as well as Twitter pages that rely on the service will issue a blocking prompt as well.
Now Google has removed the block and access should be restored.
We've heard from Google and they have removed the block. Access to Twitpic should be restored…
— TwitPic (@TwitPic) December 31, 2012