I think that issue is that, considering how much of a huge event it appears to be, you'd imagine that it'd be front page somewhere on almost every site, but despite the fact that it is being reported on, most sites have already "buried" the story in with everyday stuff so you have to actively look for it rather than being "OMG FRONT PAGE!!!!" news.
I checked the following (wide range of Left/Right) and it's not on the front page of any or even the "world" news page of the vast majority, but a couple arrested in Tehran for dancing somehow is -
Guardian - Nothing
BBC World News - Nothing
Reuters - Nothing
Sky News - 1 story at the bottom of World News
Daily Mail - Nothing
Fox - Nothing
CNN - 2 stories in the Middle East section of World News
MSNBC - Nothing
NBC - 1 story at the bottom of World News
Aljazeera - Nothing
ABC - Nothing
This isn't to say the sites above haven't reported on it, only that the story isn't obvious unless you specifically search for it on most sites.