When copying text in a different application (e.g. an editor), the copied value cannot be pasted into the NetBeans editor.
Apparently NetBeans can only paste content that has been copied inside the IDE, but not from external applications.
I think this started with 7.1 RC2
Product Version: NetBeans IDE 7.1 (Build 201112051121)
Java: 1.7.0; Java HotSpot(TM) 64-Bit Server VM 21.0-b17
System: Windows 7 version 6.1 running on amd64; Cp1252; en_US (nb)
User directory: C:\Daten\NetBeans71
Cache directory: C:\Daten\NetBeans71\var\cache
Duplicate of issue 205697, see the comments
*** This bug has been marked as a duplicate of bug 205697 ***