Crosstalk between different scope channels

I've found that there is some crosstalk between the different scope channels in at lease the V5 hardware.
For instance when you measure on CH1 a PWM pulse and at CH2 a dc voltage. The PWM pulse is seen on CH2.
This is annoying since the board becomes unusable  while measuring two signal simultaniously.
Does someone recognise this issues, and is this issue resolved at V6 hardware?

