[XeTeX] XeTeX cannot deal with pdf v1.6

[Joseph LEE]

Dear Jonathan Kew

With method (replacing dvipdfmx/config/dvipdfmx.cfg with 
dvipdfm/dvipdfmx.cfg) I have solved this problem, although a small 
deficit exists: the xelatex report

** WARNING ** << /Rotate 90 >> found. (Not supported yet)

and the .pdf image included in .tex was rotated 90 degree. This error 
also occurred while I reduce the pdf version from 1.6 to 1.4.

-- 
Yours, Sincerely

Joseph LEE