> 1. That works. I'm curious why this is needed by
> htttrack but not when I use an online browser?Don't look at the site for a
week, then your browser's cookie will have expired also.

> 1b Action=update appears to be downloading files it
> already has.  Is that expected?1) You said it previously purged everything,
so it has to redownload.
2) There is a difference between it checking if a file has changed (~5
queries/sec) and redownloading it (bandwidth.) Also dynamic html pages are
always new and must be redownloaded.
3) Is the url have something like sessionID=asdf123lkj0987 then the option
merge similar urls may help