Hey sorry to report a bug here.. (I did finally find http://twitter.com/HELP via Google, but there's no confirmation that the report was received. Upon submission of the bug report I was redirected to http://twitter.com/help/start.)
Anyway, it is sort of a developer thing, concerning geolocated tweets. Some tweets that include geodata are tagged "via [appname] from [neighborhood]" while others are tagged "via [appname] from here". (There's been a lot of weirdness in the neighborhood names, at least here in Europe.) Problem is, on Firefox under both Ubuntu 9.10 and Windows 7, clicking on the "neighborhood" links doesn't work. No response, no little map- in-a-box. The "from here" ones work fine. Is it only me?