Nerve Endings Firing Away

I’ve been experiencing a strange problem on the blog lately. It cropped up during my theme change exercise. Often when I’m editing pages, the page will at random intervals display the “Loading” message on the Firefox tab and just not load up. Opening another tab doesn’t solve the problem. No other pages will load up. But if I open up another browser say, Safari then the pages open up just fine. So I continue editing in Safari and then the same problem occurs. By that time, Firefox seems to have settled down and the blog opens up there just fine. During a long editing session, I’ve to keep switching back and forth between browsers which as you guess is tedious.

What is causing the problem? Is it WordPress and any plugins (SuperCache?) The problem just started and I’m already using 12 fewer plugins after my theme change. Or is it my hosting provider who is slowing me down but then why would it work in another browser on the same IP? and why does it resolve after a relatively short time? Or is it a browser issue as I notice, WordPress logs me out more often than before. If I know whom to blame, it would be easier.