I updated to the newest Jasper plugin and to 5.1.2 at the same time so unfortunately I'm not sure whom the culprit is, but after upgrading I get the following exception when trying to "view" reports via webclient via runReport.... NOTE: This only happens in Safari. I have tested in Firefox and Chrome and this exception is not thrown.
"Error during evaluation:Wrapped java.lang.Exception: you can only locate or create sessions in the context of a request cycle"