From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.1)
Description of problem:
When browsing web sites in epiphany, when a pop-up notification window
(one that simply receives a Yes/No/Okay answer), epiphany locks up,
occasionally consuming 100% cpu until the notification window/box is
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Disconnect self from network.
2.In Epiphany, try to access a common web site.
3.On failure, a notification box appears.
4.You shouldn't be able to use any epiphany windows until box is closed.
The simple step to reproduce may not cause 100% CPU usage, but the
ones that usally do are actual timeouts that the computer does expect.
I commonly see my cpu meter sit at 100% when I get logged off the bank
of america web site (after being inactive, BOA's web site brings up a
notification window that halts epiphany/consumes CPU)
Appears this bug is not related to epiphany, and is instead a problem
with glib. This bug has been fixed in glib 2.4.1 which was released