Sametime 188.8.131.52 just went live. Its a set of hotfixes for IBM Lotus Sametime 8.5.1. This reflectes the new numbering scheme Sametime is adopting vs the old CF1, CF2 etc numbering model.
The technote and code are available for download on IBM Support and Downloads here. The technote also links to IBM DeveloperWorks Lotus Sametime fix list site.