I just noticed that (in l2h v2k.1beta (1.55)) the defs \latex{ latex-only block } \html{ html-only block } appear in images.tex as \latex{ latex-only stuff } html-only stuff As a result, both blocks are compiled when processing images.tex. Is this a bug? (It seems to be causing me some trouble.) I would expect only the \latex{} block to appear. Thanks, Julius