Changing an element's style so that it uses an external resource shows that resource as loaded as many times as it is used in the network pane, despite it only being loaded once. Load the attached testcase and click "Change to green" 5 times to change all the bullet colors and open the inspector's network pane - green-bullet.png is listed in there 5 times.
Created attachment 20215 [details] Testcase
Created attachment 20218 [details] Testcase No idea why I used that retarded for loop in the last version... Anyway, it should be pointed out that if you were to change all of the bullets on a single pass thru, they would show up once in the network pane.
<rdar://problem/5689373>
Landed in r34059.