I had the currently latests OS X builder, 5.2.139, crash.
Preconditions:
The application starts fine and existing panel loads. Everything seem to be in order
Reproduce:
1. Add new uiImage, get added nicely
2. Select the modulator
Postconditions:
The application crashes.
I added the crash report/stack trace. I took a very quick look and at least there seem to be something in panel and the problem probably comes from JUCE, but cannot be sure. I have silicon my right eye so I cant see nothing clearly with it so that contributed to my overwhelming laziness I did not bother to look at the crash report in detail.
Ps. thanks for adding 10.6 as the base SDK in the builds.
Ramblings about things related to the studio:
http://studio.therobotinitiative.com