[XeTeX] Problem with preview, xelatex and shading in TikZ-PGF

[Andy Lin]

Hmm, I've played with the file a little bit. Don't know how to make it
work. From the results of tightpage, it looks like the graphic is
being produced and the size is calculated, but is not actually placed
in the document. It's probably some kind of driver incompatibility
between tikz and preview, but I'm not sure how to tackle it.

Sorry I can't give you more help than that.

-Andy