RHN notification icon

[Marc Williams]

I noticed a couple hours ago that there were some new files (Mozilla) in
the fedora upgrade directories.  Indeed, I received a notice of these
new files from the Fedora Announce list.  But rather than just plowing
ahead with an upgrade of these Mozilla files, I thought I'd wait until
my Notification icon turned into a red bang.  
Does anyone have any idea about how long that takes?  Is that period of
time configurable?