I had a bug report for
siunitx recently, concerning handling of the ohm symbol when the MathTime Pro package has made
\Omega slanted. As many of you will know, MathTime Pro is commercial, and so I was not totally sure I’d be able to sort the issue out. I dropped the suppliers, PCTeX, a quick e-mail to see if they’d let me see the code for bug-fixing purposes, more in hope than expectation. I was pleasantly surprised to get an e-mail back the next morning, saying that this was no problem and even letting me download the fonts themselves for testing. A ‘pat on the back’ to PCTeX: very good service indeed.