here are the instructions to upgrade tex4ht (http://tug.org/applications/tex4ht/mn-upgrade.html).
Which Eitan wrote years ago, and it's not been touched since. I guess I better eradicate that page. Advising people to replace anything in /usr/bin is a terrible idea. I have no specific idea why it fails, but I am not at all surprised it does, since it's replacing the distro-built binaries with others. In any event, tex4ht has not seen a full update since Eitan died. (I should probably delete that .zip file too.) CVR and I are still hoping that will happen at some point, but there is no ETA. Meanwhile, some of the *.4ht, etc., files have been updated by CVR and you can get the current versions from TeX Live. There have been no other substantive changes. Best, karl
