Thanks Zero!
I just released the BitQuark client update with Qt 5 support and DarkGravityWave2. This update is a MANDATORY one! You should update your client before block 1,200,000. The download links have been updated in the OP and on BitQuark.info
DGW2 will change the retargeting time from 20 blocks to 1 block.
https://github.com/bitquarkcoin/BitQuark-0.8.3r19
So QT5 I understand. Retargeting I'm not as clear on. I'm all recompiled and distributed to all my machines but what happens if someone does not upgrade their wallet? What effect does that have on them and/or the rest of us?