http://flickr.com/help/forum/41998/page2/#reply222760
I guess it is just someone uploaded about 4th June or Xiamen PX that triggers the GFW.
我认为是因为有人上传六四或厦门PX事件照片而导致屏蔽。
I don’t blame those who uploaded these photos, they didn’t mean to harm. Also, asking them to delete those photos is not according to flickr’s terms.
我也不责怪上传这些图片的人，他们并没有恶意。同时，删除他们的照片也不符合Flickr的条例。
GFW and other things is an open secret, don’t be so foolish to keep talking about. It will do us no good.
GFW和其他的事件都已经是公开的秘密，请不要继续讨论。这对恢复Flickr没有任何好处。
We can just wait and see the results.
我们只能静观其变。
I am still a little curious about the flickr main site, even with those sensitive words, it is not blocked.
我倒是比较好奇，Flickr主站即使包含这么多敏感词，仍然可以访问。
I guess flickr.com is on the white list of GFW, if there is.
我想可能flickr.com可能在GFW的白名单中（如果真的有白名单的话）。
Wish flickr back soon.
希望Flickr能够尽快恢复。