Hi, sorry to jump on this late, but I thought I'd leave upgrading to QX6/OSX Jaguar/Extensis Suitcase till later so everyone would be an expert, sadly round my way, no-one is...
What I've found is all system fonts print off fine in QX, and also in Adobe products. Ok so far.
Installing any other font I've bought externally prints fine through any Adobe product, Quark defaults to courier (or whatever).
With my font manager (Suitcase) turned off I've been told to try and stick my fonts in either my hard drive library, user library, system library. I can still print through any Adobe product, Quark still defaults to courier.
Interestingly, with any of these font placement combinations running Quark 4 in Classic, I can print whatever I want, no hassle.
Quark 'tech support' tell me to put in a new preferences folder in my Quark apps folder, making sure I use a capital "P". This actually does nothing...
Extensis tech support say it's nothing to do with their product (and I've reinstalled Suitcase just in case). And anyway, why would the fonts be printing for Adobe products?
So, if you've not tried any of this, or been on the phone to Calcutta for hours, give it a go and give me a yell if it works. Till the solution...