I will attach two screenshots. Note that in WebKit one the upper border of mail is not shown, possibly its not downloaded. The second screenshot is from Firefox from the same mail. Firefox first misses some borders too but its loading them after 1-2 seconds.
Created attachment 19854 [details] Screenshot in WebKit nightly
Created attachment 19855 [details] Screenshot in Firefox3 beta4
Can't reproduce this anymore, might be fixed due to a side effect of preloading changes. Closing as invalid.
Closed too fast it seems, I can reproduce this now, problem is some images are never downloaded, one example is https://mail.google.com/a/namtrac.org/images/2/cv/card-ex-lm.gif , I see in activity window that these images are waiting to be downloaded but they are not.
Can't reproduce anymore.