I have 2 leads on this issue.....
1) Are the 3 or 4 people experiencing the node type change crash all running a non-English version of Poser? Is anyone running the English version getting this crash?
2) I could be the version of the Microsoft Common Controls you have installed. Can the people experiencing this problem pls report the version of the Windows common controls they are using? To do this, check the C:\Windows\WinSxS\ folder - the common controls are named something like amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.9200.16579_none_418ab7ef718b27ef\COMCTL32.dll, which is version 6.0.9200.