If you need to reference objects from big containers, the current ATReferenceBrowser product, which is bundled with Plone may not be your first choice. It is very slow with many objects and it is not very well tested, if at all. The at.referencebrowserwidget aims to be 100% UI compatible but using modern components in the background . . . → Read More: Using archetypes.referencebrowserwidget with Plone 3.3

