I use Hijack Pro to have all my audio output filtered through my IK Multimedia ARC2 system. I guess it's not the main purpose of the program, but that's essentially what I bought it for. It works nicely but it has a small bug: each time I close Hijack Pro, an error window appears saying that the applicatioon quit unexpectedly, and I have to click "Ignore" to close that error window. It doesn't seem to be a serious bug, but it is bothering. (My system: MacBook Pro retina late 2013 with OS X 10.9.2.)
Unfortunately, Rogue Amoeba's assistance doesn't seem to be as good as the program. I contacted them by email 40 days ago and described the bug. They replied and asked my to send them a log file. I did that at once and they replied saying that their engineering team would take a few days to analyze my case. I have never been contacted again and other emails I sent them to have news about my case got simply ignored. Lack of assitance and lack of politeness too. A simple "we are still working on it" would have been enough.