It's not possible to select single chars on the text in the exmaple above. Double click just selects Gradient, it's not possible to select another word beside selecting the complete text with tripple click.
(Selecting of char's never worked correctly, but was possible in earlier versions)
Known bug, this can't work at the moment, since we've switched to use offsetForPosition() in the SVG Text code, which is not implemented for SVGFonts. See SVGFont.cpp, TODO in the last function.
This should be fixed by the patch I submitted today for https://bugs.webkit.org/show_bug.cgi?id=36840 .
Fixed in r89233.