If you watch the network bandwidth usage while this new window is coming up you can see a lot of traffic from the server to the client. Without pulling out wireshark and actually looking at it my guess would be that the popup window is loading the interface all over again...which is a bug in my opinion. Upon a second opening of the popup window none of this traffic occurs and the window loads almost instantly.
EDIT: I am seeing this on trunk firefox builds on windows Vista. Our server is 5.0.2 FOSS running on OpenSUSE 10.3. |