Strings Crash

I'm using Windows Vista, running Musescore 0.95 R1860:1861

1. Start a new score from scratch

2. Add piccolo and flute (or ANY TWO instruments, they all seem to work to cause the crash)

3. Add Violins1, Violins2, Violas, Violincellos, and Contrabasses

4. Choose ANY of the Key signature, Time signature, and Score length options (or just click through the defaults)

5. BANG! Get a message box that says the application has requested termination in an unusual way.

This also happens if I add the stringed instruments first, and THEN any two others.

This was also happening at least as far back as R1833, but I didn't experiment with it enough to determine a simple re-produceable "make it crash" sequence.

Error message details:

Problem Event Name: APPCRASH
Application Name: mscore.exe
Application Version: 0.0.0.0
Application Timestamp: 4a270c05
Fault Module Name: QtCore4.dll
Fault Module Version: 4.5.1.0
Fault Module Timestamp: 49eeba31
Exception Code: 40000015
Exception Offset: 0000cb08
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Information 1: 45a8
Additional Information 2: 772ba4ef0c1ba2e96dbeb5b92f63cffa
Additional Information 3: baad
Additional Information 4: 40e8d2f0de56a2e523559781eaf00a22