It doesn't happen a lot of for me, but sometimes, the developers aren't mac friendly so you kinda have to live with it.
Thanks for the feedback, in 0.7.x it used to happen sometimes, in 0.8.x it never worked on my Mac.
If "the developers" aren't Mac friendly, they should learn to be more platform agnostic. I have been developing myself over the last 20 years on AmigaOS, MS-DOS, Windows NT, Linux, Mac OS X, iOS and Android platforms (in more or less that order...), and a lot of platform-independent web apps / web services / REST APIs now, and I hate when the geeks start to act out like the religious people.
On the other hand, some platforms are more developer friendly than others. Precisely, Mac OS development, IMHO, is a pain for those coming from other platforms and who are not willing to take time learning the specifics of MacOS X. I don't know specifically about Qt support in Mac OS X, however.
So, I won't blame "the developers" if they are not doing anything to support Mac extensions because it would require some time that nobody has right now. I would blame them, however, if the MacOS X binary was lagging behind or left unsupported for "techno-religious" reasons.