For the past two days, I have had to keep using the refresh button. Even that does not help most of the time. I,too ,feel the ads have something to do with it. Also, tech help keeps saying no new posts. Come on, I'm sure I am not the only one having trouble!!
You're not alone, I also think it's the ads. Try disabling your "Shockwave Flash Object", either under Tools, Manage Ad-Ons, or if you've got a spyware program with a flash killer. It helps a little bit.
I've been noticing that periodically over the past few days the site seems to stall out completely while loading a post. My activity bar says only "waiting for google.com". It can stay like that for minutes, until I stop the page load and reload it.