On October 14, Oracle released patch 19261194 for OBIEE 188.8.131.52.141014. This patch does not contain any new features; however, there are 86 bug fixes in the readme. The bug fixes were in BI Publisher, BI Server, and BI Presentation Services.
One of those fixes is addressing SSO between EPM Workspace and OBIEE. For those customers living on the edge and wanting your OBIEE presented in EPM Workspace, this might be the key to getting that integration working with SSO from Workspace into OBIEE and back into Essbase for analyses/dashboards.