Manually dismissing a flag from a question page appears to be broken; nothing happens when I click the "no action needed" button. Tried on Chromium 32.0.1700.19 and Firefox 25.0, on Linux. Dismissing from the flag list still works fine.
I added individual flag dismissing and there was an issue on the Question/Show page - it should now be resolved.
Going to be honest, there are some UI issues still, e.g. after clearing a single flag, the UI might disappear from Question/Show. Trying to sort it out, but the code isn't very extensible.