Comment 3 for bug 195088

Yes I do have such a file, but it's empty!

xxx@somerset:/var/lib/dpkg/alternatives$ ls -la ps2pdf
-rw-r--r-- 1 root root 0 Feb 7 08:32 ps2pdf

Removing the file has fixed the problem, ubuntu-desktop, ghostscript and dependencies now install correctly.

Thanks.
John.