Vin Shelton writes: OK, victory at last. It _is_ a rebase problem, but not with xemacs as such, rather GTK. The clue was that 2.4.15 _did_ rebuild OK when all I did was 'make clean && make', so I looked at the differences between the two src directories with a microscope, and noticed that 2.4.16 was using libtiff3.dll and jpeg62.dll from GTK and (because I had built it before I installed GTK) 2.4.15 was not. Now I had rebased those two by hand (because for reasons I can't now figure out rebaseall didn't do them -- pbly because I installed GTK 'by hand' as it were, not via the package mechanism), but I had _not_ checked _their_ dependencies, and sure enough: 1) libtiff3 uses GTK's zlib1.dll 2) rebasing zlib1.dll solves the problem. Phew! So let's hope this thread will help anyone with the same problem. Thanks again for patient suggestions which eventually led to the solution. ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh Half-time member of W3C Team 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht(a)inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam]