The list of all referencing bundles is available here.
The following bundles have references to org.eclipse.equinox.preferences (3.2.100.v20070522)
Bundle | Version | Reference Count |
org.eclipse.core.contenttype | 3.2.100.v20070319 | 99 |
org.eclipse.core.resources | 3.3.0.v20070604 | 195 |
org.eclipse.core.runtime | 3.3.100.v20070530 | 124 |
org.eclipse.debug.core | 3.3.0.v20070607-1800 | 4 |