[ESS] Select CRAN mirror fails the first time

[Stavros Macrakis]

When I perform a command that requires a CRAN mirror (e.g.
update.packages) under ESS, the system hangs and does not display the
CRAN mirror selection window.  If I quit out of this (C-g C-c C-c) and
try again, it works on the second try.  Under the RGui, the popup
window works the first time.

Is there a fix or workaround for this?

            -s

ESS 5.3.10
R 2.8.1
Emacs 22.3.1
Windows XP