Podcast Art Question

Question

Hi all,
Ultra newbie here with probably an obvious question.  I recently submitted two separate podcasts to iTunes, and they both seem to be up and running in the store.  Right now, the art that goes with them is not there--just the generic podcast icon.  I gather from what I've seen on this forum that this is pretty much par for the course--the podcast goes live long before the associated cover art appears in iTunes.  In both cases, when I submitted my feed (I'm using Feedburner), the art popped up on the confirmation page, so I assume all is basically well.
I have two slightly more subtle questions, though.  First, I've subscribed to both podcasts myself to make sure they would download okay, and they do.  In the case of the first one (the art of rhetoric one), it even shows up with the cover art, even though it doesn't appear in the iTunes store yet (which, I assume, means it's just a matter of time before it *does* show up).  With the second podcast, however, the episode downloads, but unlike the other podcast, the art doesn't get downloaded with it--just the same old podcast icon.  Is this just a fluke, or is this cause for concern that there's something wrong with the image?
A second minor question is that with the art of rhetoric podcast (i.e., the one that *does* download the cover art with the episode), the art appears, but the right and left edges are cut off just a bit.  I thought I had been incredibly careful to format the jpeg to be precisely square at 300 x 300 (the numbers I saw recommended by iTunes).  It's easy enough to rejigger the jpeg to allow for more margin space, if that's necessary.  The question is this: if I change the link to this cover art jpeg with Feedburner, will it then automatically change (eventually) in iTunes?
Below are the itunes links to the two podcasts.
Thanks in advance for helping out a newbie!
Cheers,
Ted
http://itunes.apple.com/us/podcast/the-art-of-rhetoric/id451912125
http://itunes.apple.com/us/podcast/behind-behind-the-headlines/id451518148

Answer 1

Hi again,
I *think* I've figured out the problem.  I was a bit thrown by the note that there wasn't a media file associated with the new Rhetoric episode since I had certainly uploaded one, but thanks to your prodding, I went back and figured out (probably) what the source of confusion was. 
When setting up my podcast feed using the combo of Blogger and Feedburner, the instructions said to make sure to show the link dialog box in the header for each new blog post associated with the podcast in addition to the title.  I did that and was dutifully including a link to the media file in that dialog box when making a new post.  I had assumed that this was the link that "assocated" the linked media file with the blog post (and, hence, the feed generated by feedburner).
That seems to have worked in the posts for the "Headlines" podcast, but in the Rhetoric podcast, I noticed that I had also linked to the media file in the text of the blog post itself, not just in the link dialog at the top, in the first post.  In the second one, I had not.  When I viewed my feed details in Feedburner, I was given the option to "Play Now" the podcast for the first lecture, but not the second.  I went back and included a link to the media file in the actual text of the blog post for the second lecture, and went back to Feedburner.  Now, I was given the "Play Now" option for both lectures.  I assumes his means that now there truly is a media file associated with this post, and next time iTunes checks, things will be hunky dory.  We'll see.
I'm still not quite sure why I had to link to the media file in the text of the blog post for one feed, but don't seem to have needed to do that with the other.  It's not a problem to do so, but I'd be a bit more comfortable if I knew why this was the case. 
At any rate, thanks again for the help.  I'll likely have more questions as things continue, but I'm keeping fingers crossed that I've managed to get things up and going now at long last.
Cheers,
Ted