Try the recommendation I gave you awhile back to repair your bbPress forums:
https://github.com/cuny-academic-commons/cbox-theme/issues/150#issuecomment-19228271
This problem might have occurred in an older version of bbPress and Google was quick enough to cache your forum data. The next time Google tries to cache your data it should be invalidated.
After that, your problem should hopefully not occur in future Google caching attempts.
Also check to see if Google’s cached link is actually accessible. If the link itself links to a private / hidden group, then the content cannot be viewed.
Before posting here, you can also check to see if there is already a reported problem on the actual plugin’s support forum. The support forum for bbPress can be found here – http://bbpress.org/forums/
Please remember that CBOX is a conduit to other open-sourced WordPress plugins. While we try our very best to maintain quality control, it is not possible for us to address things immediately. We have to see if the bug report is valid, then provide a solution if one doesn’t already exist to the maintainers of the actual plugin.
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