I installed the SSL cert and tweaked all the appropriate files as stated in the guides....everything worked perfectly for weeks.....

Then, at some point, it broke.....I can connect to the https: site, and I see the padlock for a second, but when the page is finished loading I get the question mark over the padlock (Firefox) and the blue bar disappears - even though the address bar still shows "https:"...
Error says that the entire page isn't encrypted....

I have checked and rechecked, but I can't figure out what tweak, mod, template, or addition would be causing this.....possibly Google checkout??

any ideas as to where I should be looking?

Thanks!