Thanks tautech ... I have been lurking on the forums for years, but never got around to registering or posting stuff.
Following up on the trend chart issue, I also saved the captured data to a USB stick and verified that the data collected is correct, so the bug is isolated to the graph updating routine.
I did notice another issue, this time with the acquisition delay. If you change it to manual mode and try to set the delay to 10 s by changing the unit from us to ms and then to S, it does not work - the value is not altered or applied (you can watch the trigger indicator at the top of the display). However, if you stay on the us scale and just keep increasing the number to 1000 us, then 100 000 us, it automatically changes units and applies the delay correctly. The next problem is that if you try to set the unit prefix back to say ms, it does not work. The range is stuck in seconds and a reboot is necessary to reset the state.
Sorry if the description is a bit convoluted, but even taking photos does not really help.
Cheers,
Al