TLF Hanging in 4.5.20967

We just noticed that our application would hang (for 15s) with the following warning after upgrading to the release 4.5 SDK:

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/mouseUpHandler()

As the code snippet, we are clicking an item within a chart and the entire application would freeze up.

Anybody seeing the same thing? We can reproduce this fairly easily (just click around on a chart).