The furigana on this site is auto-generated, so it obviously doesn't take context into account. However, it can be corrected by the owner of a sentence. If you leave a comment under #74082, maybe @fcbond will react.
The message on the "Audio" page of users who have not contributed audio records says "X does not have contributed any audio". I guess it should be changed to something more grammatical. https://tatoeba.org/rus/audio/of/Wezel
I personally think that grey is really better because it allows the eye to concentrate more on the sentence itself and less on the info. Increasing the font would probably serve the same purpose, but maybe changing the colour is enough.
If the sentence info has to have a separate line, maybe it’s a good idea to place it under the sentence, not above it? It seems like the language and info icons are currently aligned with the sentence itself, and in short sentences they end up at the bottom of the header, which IMO doesn’t look good. I mean this: http://i.imgur.com/qyZSAnf.png
I know that “doesn’t look good” is a bad argument, but still I don’t think it was intended to be like this.