I'm using eclipse 4.2m4 june and mercurialeclipse 1.9.1.v201111302231.
when I opened history and click any changeset, a diaglog appeared and show the following message:
An error has occurred. See error log for more details. com.vectrace.MercurialEclipse.history.GraphLogTableViewer cannot be cast to org.eclipse.ui.part.PageBookView$SelectionProvider
my os is Lion 10.7.2 and jdk version is 1.6 update 29.