Tempo Social Feeds

Uldis

We have Tempo Social 851. There is some weird problem with Feeds. We get error message -

Failed to retrieve activity feed : Invalid UTF-16 surrogate detected: d83d ?</errormessage><exception-report class="java.io.IOException"><message>Invalid UTF-16 surrogate detected: d83d ?</message><cocoon-stacktrace><exception><message>Invalid UTF-16 surrogate detected: d83d ?</message><locations><location uri="file:/C:/OT/Collaboration/XAPITemplates/sitemap.xmap" line="818" column="34">&lt;map:serialize type="xml"&gt;</location><location uri="file:/C:/OT/Collaboration/XAPITemplates/sitemap.xmap" line="817" column="38">&lt;map:transform type="include"&gt;</location><location uri="file:/C:/OT/Collaboration/XAPITemplates/sitemap.xmap" line="816" column="42">&lt;map:generate type="activityfeed"&gt;</location></locations></exception></cocoon-stacktrace><stacktrace>java.io.IOException: Invalid UTF-16 surrogate detect

We didn't have this error before. Just showed up, i think this is because of some post that spoils the whole list.
In mobile Tempo Social application feeds are loaded fine.

Any idea?

Thanks

Uldis