While we are working out the initial set of bugs everything can be reported here or in JIRA under the developer.qt.nokia.com component. The Qt web team will sort/triage this in any case.
When the doc feature matures, our task this summer, I'll ask that bugs in the actual documentation (the API ref, the examples, the demos etc.) gets reported in JIRA under the doc.qt.nokia.com component. While bugs in the devnet implementation of the documentation (the frame around it, doc notes, tag/rating, search, docmarks, performance) is reported as now.
The reason for this is that we are two teams working together to get the documentation out: the Qt Doc team for the actual documentation (the biggest task by far!) and the Qt Web team for the online implementation.
Project Manager - Qt Development Frameworks