> Those not downloaded are not on my hd yet,it's 
strange,the 
> engine works spending all the time that is really needed 
to 
> download (  jpg files)

Was the engine downloading files, and not saving them? Or 
just the engine did not "see" these files?
> relative option is NOT checked:so do you think that 
making 
> an update (re-scan and re download)to my iincomplete site 
> could fix the problem?
A "Continue.. " should fix the problem (except if the cache 
was corrupted? but this should never happend, even with a 
sudden reboot), and if not, "update" should.. but I still 
don't understand what's goind on on the "continue process"