I tend to lurk around this site, as the questions are usually quite interesting. But I'm not enough of an expert to answer (m)any of them.
6 Vector notation in siunitx Jan 12 '13
5 Titles ending with punctuation in biblatex-ieee Dec 4 '12
4 \textmu doesn't work with newtxtext Feb 10 '13
2 Setting camera view within Sketch May 13 '14