Whilst running bash in a nxterm, upon catting a .db file produced by suck, nxterm core dumps (apparently in strcpy, but the distributed version has no debugging symbols) I'm unsure as to whether all .db files produced by suck do this, or just this one, so i've made the file available on the ftp site I run, if you wish to test this with a debugging version. It's accessible at ftp://ftp.mirai.net/pub/temp/suck.db
actually, this is a problem with xterm in general, not nxterm - nxterm no longer exists as of Red Hat 6.0, it is simply a symlink to xterm. I am fairly confident that this bug will be fixed in XFree86 4.0, as a lot of work has recently gone into xterm. However, for now, "don't do that." :) I think you just found a random collection of binary data that exercises this bug, and I doubt it is all .db files. For instance, cat'ing /usr/bin/ls in an xterm, which is a much larger binary, doesn't cause a segfault.