If you try to copy text from a 2.5 branch wx.stc.StyledTextCtrl and paste it in a 2.4.2.4 wx.stc.StyledTextCtrl nothing happens. The other way (2.4 -> 2.5) works 
2.5->Notepad->2.4 works too
Stumbled uppon it while samlessly copy&pasting code from the 2.5 demo to PyPE (started on 2.4.2.4)
Tested it on Boa too... just to make sure
路路路
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Peter Damoc
Hacker Wannabe
http://www.sigmacore.net/about.html