Progress has released Service Pack 2 on September 3rd, 2009 which also contains an update to the Infragistics Controls (OpenEdge UltraControls).
The previous version shiped with 10.2A FCS will be uninstalled during the service pack installation process and is no longer available. As a result you have to update the assemblies.xml files before you'll be able to compile the SmartComponent Library and applications based on it.
The change is from Version=8.1.20081.1000 to Version=8.1.20081.2150
Please download the attached version of assemblies.xml and use this when compiling the SmartComponent Library with OpenEdge 10.2A02. When you've made local changes to the assemblies.xml file, those changes should be merged to the attached file.
References to written documentation