Copy-Paste form external sources does not work on Windows 8.1

Hi dear all, I am currently taking a couple of tutorials on Pharo and I noticed that cutting and pasting code snippets from the web, pdf, notepad, ... to Pharo 4.0 was not working on my Windows 8.1 installation. I double checked that versions 3.0 and current 5.0 exhibited the same behavior on 8.1.I double-checked this problem does not manifest on Windows 7. Am I the only one to experience it?Thanks in advance, Dominique