I'm actually curious if this is a violation. Does anyone know? The font is definitely different and the F is even capitalized on the boat graphic, though the colors are the same and the name "flickr" is in there. It makes me think of those cereal brands that try to make you think they're the popular brand by dancing as closely as trademark law lets them.
Back in the day I was the first person to create a service using the Flickr API, so that the Flickr folks could show off their API when they launched. I called my demo app reviewr.com [1]
My original choice of colour scheme was (deliberately) very close to what Flickr was using at the time, and Stewart Butterfield (who ran the show back then) asked me to change the colours a bit.
I don't recall Stewart having a problem with me dropping a vowel in the domain name, even though at the time this was a novel domain hack on the part of Flickr.
