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Sorry about the CRLF ..... you don't want to be checking the timestamps 
on the server with a slow connection. Just hold the last updated 
value locally and if it changes then transfer the file.  Same for 
deleting ... else you spend all of your time checking on the server 
over a slow connection.    You could check the timestamps or hash 
the local value ... then if  the hash value of the source changes, 
transfer the updated version.     There's some code to do some of 
this in build-sie.r  http://www.rebol.org/cgi-bin/cgiwrap/rebol/view-script.r?script=build-site.r
 but it's a rebol-ish task.

Thanks, Mike. I'm studying the build-site.r code now.

if you are on an unreliable or slow connection, you might experience 
timeouts which will in turn cause network errors. I recently worked 
on a similar system and you have to basically wrap all code that 
access the internet in TRY and do a lot of error trapping and possibly 
some retrying to ensure that uploads and downloads of entire filesets 
are done correctly. The code in build-site.r will not do that, so 
you have to restart the upload if it fails.