Fwd'd from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=218480

From: "Marcelo E. Magallon" <mmagallo@debian.org>

Hi,

 I paused a download because it was hogging the downstream connection.
 After a while, I resumed it again... Epiphany seems to remember only
 the time when it started the download, which means it guesses the
 remaining time as:

            t = (S0 - S)/r

 where r is download rate, and S0 the total size, S whatever it has
 downloaded thus far.  And r seems to be:

            r = S/T

 where T is the enlapsed time.  This means that when I pause the
 download, this rate doesn't have anything to do with the current
 download rate but with some sick average with no physical significance
 at all.  Using the current download speed is also bad, because that can
 change wildly.  Using the moving average over the last N time steps
 produces the desired result.

            r = S'/T'

 where S' is the ammount of information downloaded in the last N
 timesteps and T' is the corresponding time.

 Now, if instead of reinventing the weel, Epiphany were to use something
 like GTM we wouldn't be having this discussion.  Sadly the development
 of GTM seems to have stalled, it hasn't been ported to GNOME 2 which
 means it's not cool anymore... there's something newer, downman, but it
 doesn't seem to be packaged for Debian yet.