I depend on this feature a ton, and am hoping this is a bug instead of a conscious change in functionality. I haven’t had the time to do all the testing and bug tracker searching across the Chrome, Chromium, and WebKit projects yet, but I’m hoping I can get some word on this change from someone with more knowledge about the issue:

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Chrome lets you create new CSS rules right inside the DOM inspector. I used to be able to then view all those rules in the Resources pane, but now that view instead shows the document source. This could have been a conscious decision – perhaps people want to see their changes to the HTML in addition to the CSS – but it’s clearly favoring one output over another. Perhaps what I’m looking for was moved, or deemed irrelevant? I wish I knew.