Same here, when running WindowBlinds, WindowFX and OB on Win 2K. Have tried running each seperately and even if I run windowBlinds after everything, manually, the buttons don't work 9 times out of ten. This is the same for WB on it's own..... clean boot.....
System:
Win2K
Geforce 2 MX Creative 12.9(? Brand new from WinDrivers) Drivers
458Mb RAM
Also noticed that it takes about 40 secs to load WB now on 2K and it slows everything quite considerably. I have tried MSWHQL certified drivers as well as beta...... no diff