When installing ODS v3.1.1 on top of RBD v.188.8.131.52. The installation manager gave me this message:
Error during "complete" phase:
CRIMA1084E: The singleton bundle "org.eclipse.epf.richtext_1.5.0.v20080714-1745" cannot be installed in this Eclipse configuration because there is a non-singleton bundle "org.eclipse.epf.richtext_1.6.0.v20101028_0720" that is already installed.
ODS v3.1.1 was newly released on April 30, 2012.