TLF code freezing up application

Since upgrading to the final release SDK for Hero, we have seen our application freezing up intermittently. As the stack trace suggests, it is related to clicking on points on a line chart.

Has anybody seen something like this before?

Flex SDK 4.5.20967

Flash Player 10.3.181.14/26

Error: Error #1502: A script has executed for longer than the default timeout period of 15 seconds.

at flashx.textLayout.container::TextContainerManager/http://ns.adobe.com/textLayout/internal/2008::factoryUpdateContainerChildren()

at flashx.textLayout.container::TextContainerManager/updateContainer()

at HTMLHelper/composeHTMLText()

at mx.core::FTETextField/validateNow()

at mx.core::FTETextField/get textWidth()

at mx.charts.chartClasses::DataTip/measure()

at mx.core::UIComponent/measureSizes()

at mx.core::UIComponent/validateSize()

at mx.charts.chartClasses::ChartBase/positionDataTips()

at mx.charts.chartClasses::ChartBase/updateDataTipToMatchHitSet()

at mx.charts.chartClasses::ChartBase/processRollEvents()

at mx.charts.chartClasses::ChartBase/mouseDownHandler()

at flash.events::EventDispatcher/dispatchEventFunction()

at flash.events::EventDispatcher/dispatchEvent()

at mx.core::UIComponent/dispatchEvent()

at mx.managers::SystemManager/mouseEventHandler()