We have Ultrawebgrid in a webpage inside frame(iFrame) which is almost exactly same as Netadvantage online help system in functionality. We have a search button in the parent window and upon click on the search button ultrwebgrid inside the iframe gets refreshed. What we have noticed was the amount of memory used by the IE keep on increasing between 4MB - MB for each button clicks. I have noticed the simillar issues with  Netadvantage online help system http://help.infragistics.com/NetAdvantage/NET/2007.1/CLR1.x as well [Please refere the image below]. This sounds like javascript memory leak somewhere in the ultrawebgrid and due to this we are not in a position to release our app to production [Didn't get through in the performance test]. I would appreciate support from infragistics design team / community.