Does the Webkit engine make use of the browser cache when downloading images?

I am creating an application that downloads a lot of images. Its an HTML Javascript based AIR application. I can't seem to find any documentation that relates to how cacheing is handled. Is there a cache for the webkit browser?

Can you copy this to the Feature Request forum so we can vote on it please?  http://feedback.photoshop.com/photoshop_family  And then post the link here so we can find it.  It'll get my vote.
There are a couple of others you might like to vote on too, such as using the embedded preview for editing down.  http://feedback.photoshop.com/photoshop_family/topics/lightroom_capability_to_display_embe dded_preview
In terms of workarounds for now, if you haven't tried the 4.2RC yet, you might find the module switching a bit faster.  And for better use of your exports processing power, try splitting your export into 3 or 4 and running them concurrently (i.e. set the first going, and immediately set the second going, etc.) as that'll make better use of the extra cores if your hard drives are able to keep up with them.

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