This is a regression introduced during the pasteboard refactoring.
Created attachment 82371 [details] Patch
Comment on attachment 82371 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=82371&action=review > Source/WebCore/platform/mac/PasteboardMac.mm:147 > + // Using different API for WebKit and WebKit2. Perhaps this should be a FIXME and explain what’s broken in the WebKit2 case (namely, no attributes) rather than just say the API is different.
http://trac.webkit.org/changeset/78517