I found a bug in the Adobe bug tracker. It says it's only in Flex Moxie Beta:
ComboBox shows IBeam cursor and text is selectable by default: http://bugs.adobe.com/jira/browse/SDK-12032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel However, I am experiencing the exact same behavior in 2.0.1. Here's my sdk desc: <flex-sdk-description> <name>Flex 2.0.1 Hotfix 2</name> <version>2.0.1</version> <build>166910</build> </flex-sdk-description> : : ) Scott