[NTG-context] PDF output versions?

I just noticed that when I compile ConTeXt files with texexec -pdf, my copy of Acrobat 5 complains about "the PDF version of this file is too new for this viewer", but when I compile LaTeX files with pdflatex, I don't get that complaint. Is there some way to set ConTeXt and texexec to create PDF files of the earlier version? (I'll upgrade Acrobat eventually, but I have the full version and use the editing features a fair bit, and I gather that having the full version of Acrobat 5 and the free version of Acrobat 7 on the same machine causes lots of headaches.) - Brooks