http://blogs.technet.com/b/toml/archive/2011/07/25/office-for-mac-2011-communicator-on-macos-10-7-lion.aspxAs noted in the comment (thank you) the update is here - http://support.microsoft.com/kb/2587147 With the recent release of MacOS 10.7 Lion customers are experiencing issues with Office for Mac 2011 including Communicator for Mac 2011. For those newen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/toml/archive/2011/07/25/office-for-mac-2011-communicator-on-macos-10-7-lion.aspx#3443810Wed, 27 Jul 2011 21:50:50 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3443810William Smith<p>Microsoft released version 13.1.2 on July 26. This update addresses the crashing issue on Lion.</p> <p><a rel="nofollow" target="_new" href="http://support.microsoft.com/kb/2587147">support.microsoft.com/.../2587147</a></p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3443810" width="1" height="1">