I have had this problem ever since Blogger updated to their verification system implemented for comment posting. This verification system involves (I believe) some sort of IFrame that pops up, in which a series of letters appear in a convoluted pattern and manner. This "message" must be typed into a box for confirmation that I am a human posting and not a spambot.
I used Firefox before this verification system was implemented. Comment posting was no hassle at this point. Now, however, I cannot post via Firefox. When I click to post, the IFrame pops up but without any image. The text entry box is present for the confirmation, but the text image from which I would derive the confirmation message is missing (during this time, I am logged in, so that shouldn't be a problem). I have turned off all of my add-ons (these include NoScript, Web of Trust, Styler, etc.--anything that could possibly get in the way of something opening exactly how it should) and have remained unsuccessful.
However, I am able to post within IE. The posting of comments works flawlessly, though "flawlessly" and "IE" shouldn't be in the same sentence.
Back to the point: I would like to use Firefox for posting on Blogger, 1. because it is easier to deal with a single browser with a single window, and 2. because of security issues with IE.
IE works in the current configuration (I believe it is different than just 'default') I am using, which includes Site Checker and modifications to security settings. Firefox has different add-ons and some modifications to configs (though I cannot think of any that would interfere with this IFrame loading). I am thinking this is a Blogger problem simply because my controls of Firefox and IE did not change one bit between the time in which I could post comments on Firefox and now.
I was wondering if I could alleviate this problem, or if this is a Blogger glitch/problem that is entirely out of my control.