fontHasVerticalGlyphs() in SimpleFontDataMac.mm passes kCTFontTableOptionExcludeSynthetic to CTFontCopyAvailableTables(), but there is no need to do so (the option only affects 10.5-linked apps).
Created attachment 129188 [details]
Comment on attachment 129188 [details]
Clearing flags on attachment: 129188
Committed r109080: <http://trac.webkit.org/changeset/109080>
All reviewed patches have been landed. Closing bug.
This is surprising. Doesn't WebKit need to support 10.5-linked applications?
I learn something new every day. Does WebKit support vertical text on 10.5?