We use other web parts without problems in the tabs of the qDynamicLayout web part. The problem mentioned above was due to a bug in the first relase of the web part that the users had to have edit access to the page the qDynamicLayout was on but now they've resolved that issue in the currentl release. I've had no problems with the qDynamicLayout since upgradign to the newest version and we use it on quite a few pages exposing quite a variety of different web parts, Quick App ones as well as OOB SharePoint ones and a few custom built ones.