The “classic” randomizer plugin from Rick does work for me in EE 1.6.0 (build 20070627 in this case - don’t think that matters here) for displaying random quotes. So, it does not seem a compatibilty problem with EE 1.6.0. But it can always happen that you accidently overwrite your modified copy when updating to a new version/build because its a plugin that is in the default installation set and that needs modification by the user to work as expected.
-Markus
Packet Tide owns and develops ExpressionEngine. © Packet Tide, All Rights Reserved.