A fix is in the works for 8.5.2 FP1 (hopefully) to resolve the issue, but in the mean time, to resolve/prevent the problem, the best thing to do is to add two lines to your hosts file that resolve to 127.0.0.1, like this:

server.                                127.0.0.1
server.yourdomain.tld.       127.0.0.1

Beginning with version 8.5.2 of IBM® Sametime®, it is possible to install and run multiple Sametime products side-by-side within the same IBM WebSphere® Application Server instance; in other words, to have coexistence. This article walks you through the steps required to set up a sample coexistence environment.

Widgets and Live Text enables IBM® Sametime® Connect client 8.5.2 end users to see and act on Live Text in the Sametime chat window and chat history and use widgets (.XML files) created for their use. Power users and administrators can create and edit widgets and deploy them to users to engage a web page, feed, or Google Gadget, and install features from an update site.

The information provided here is for the Sametime Connect client. See the Lotus Notes® documentation for information about the Live Text and Widgets features for Sametime that appears in the Lotus Notes sidebar. In this case, the Lotus Notes Live Text and Widgets features also control Sametime in Notes.