If I navigate to the findbugs panel the trend and summary data comes up fine but the details info just
pinwheels. This happens in safari 3/4beta and firefox 3.0.x on the mac.

After poking around with various debuggers in ff I found

"Security Error: Content at https://hudson.*****.com/job/****/421/findbugsResult/tab.packages may
not load data from http://hudson.*****.com/job/****/421/findbugsResult/tab.packages/."

Maybe this is due to running our server of https?

I'm also, according to firebug, I'm getting a 404 on https://hudson.*****.com/assets/skins/sam/sprite.png
and a 302 on https://hudson.*****.com/job/****/421/findbugsResult/tab.packages

Hope that helps