8.5. Debug Corner: Navigation Problems
XUL's navigation tags are so straightforward that few thorny problems exist. For difficulties with individual tags, see the text for those tags.
In more general terms, layout is the main source of problems with these navigational tags. If you push the use of these tags too far, they will not lay out properly. Use them as they are intended to be used. An alternative is to study the XUL layout mechanics behind these tags very closely and then to patch their behavior with extra style information.
The sole other problem you might encounter is difficulties with widget focus and selection. Although this system recently improved in 1.4, it is sometimes possible to confuse the window, the running platform instance, ...
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