Watch out for this one: "zcat file.gz" deletes file.gz after cat'ing it.
I think this might be the same as busybox bug #1241 <http://bugs.busybox.net/db/12/1241.html> "bzcat tries to delete files", which they report as fixed in CVS on 26 Apr 2002. But it's not clear if this made it into their latest stable version busybox-0.60.3, released the next day. It isn't listed in the Changelog. (TomsRTBT-2.0.103 has 'busybox 0.61.pre' - is that newer than 0.60.3?)
