As described in WebCore involved in crashes some Entourage users are experiencing frequent crashes involving Webcore and JavaScriptCore. Matt Ridella, an Entourage user has suggest this workaround to stop the crashes until a fix is found. Please let us know if this workaround stops the crashes for you.
In Entourage preferences, go to Security and uncheck "Display complex HTML in messages" and make sure that "Download pictures" is set to "Never".
(Edited photo 082209 for clarity)
Preferences can be found under Entourage in the Menu bar.
Examples of crash reports
Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2009-08-19 10:14:54 -0700
Application Name: Microsoft Entourage
Application Bundle ID: com.microsoft.Entourage
Application Signature: OPIM
Application Version: 12.2.0.090605
Crashed Module Name: JavaScriptCore
Crashed Module Version: unknown
Crashed Module Offset: 0x0000382c
Blame Module Name: JavaScriptCore
Blame Module Version: unknown
Blame Module Offset: 0x0000382c
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
Error Signature:
Exception: EXC_BAD_ACCESS
Date/Time: 2009-08-19 12:01:48 -0700
Application Name: Microsoft Entourage
Application Bundle ID: com.microsoft.Entourage
Application Signature: OPIM
Application Version: 12.2.0.090605
Crashed Module Name: WebCore
Crashed Module Version: unknown
Crashed Module Offset: 0x0000c070
Blame Module Name: WebCore
Blame Module Version: unknown
Blame Module Offset: 0x0000c070
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
