Things continue to get better with this issue. We've changed the way that our web search works so that now if we have a cache of the image we'll use that first instead of pulling from the original and then later swapping to the cache (don't ask me why we weren't doing it this way already). So if you were having issues adding new images from the web search, at least most of those should be resolved. We're also working on switching to caches in campaigns that are being run right now, so things should be back to a very good state here soon. Thanks for your patience.