Favourites: Right click and copy, then paste does nothing

I would expect to be able to create a duplicate favourite in the same folder by copying and pasting it, as the menu options are there but this does not seem to work.

I know I can copy and paste to another folder but not being able to duplicate entries is inconsistent with Windows Explorer, and a feature I find myself needing quite a lot.

+- System -----------------------------

Microsoft Windows XP Professional
Service Pack 1 (Build 2600)

CPU Speed : 1734 MHz
Total Memory : 1572336 KB
Free Memory : 1104600 KB

+- SmartFTP ---------------------------

Version : 1.0.982.3
Time Stamp : 2004-05-02 16:30:08

+- Application DLL --------------------

controls.dll : 1.6.982.3
ftpapi.dll : 2.0.982.3
language.dll : 1.0.982.3
reseng.dll : 1.3.982.3
+- System DLL -------------------------

shell32.dll : 6.00.2800.1348 (xpsp2.040109-1800)
shlwapi.dll : 6.00.2800.1400
comctl32.dll : 6.0 (xpsp2.040109-1800)
riched20.dll : 5.30.23.1211
schannel.dll : 5.1.2600.1347 (xpsp2.040109-1800)

+- Internet Explorer ------------------

Version : 6.0.2800.1106

+- Winsock ----------------------------

Winsock : 2.2

Cheers,
Tom