corel x6 crashes unexpectedly when moving muliple objects

Today i started to experience this crash while moving multiple grouped objects. These objects were from a powertrace and had transparency. this is on vista 64bit. doesn't happen all the time, but i am just curious if anyone else has had this problem?

Problem signature
Problem Event Name:    APPCRASH
Application Name:    CorelDRW.exe
Application Version:    16.2.0.998
Application Timestamp:    50b2a2e4
Fault Module Name:    CdrTra.dll
Fault Module Version:    16.2.0.998
Fault Module Timestamp:    50b2a50f
Exception Code:    c0000005
Exception Offset:    000000000003b757
OS Version:    6.0.6002.2.2.0.256.6
Locale ID:    1033

Extra information about the problem
Bucket ID:    94246814