I was looking at my previous nights' data and just noticed my pressure graphs are showing the wrong scale. I don't know what triggered this. I did make some pressure changes on my S9 AutoSet which show up as new prescriptions in SleepyHead, but I don't think that caused it because I've done that before.
The graph below shows my pressure ranging from 9-15 cmH2O (mask pressure 6-15), but the machine was set to 4-10. The details panel on the left hand side appears correct, so it's just the scale on the graphs that's wrong. I don't yet know if other graphs besides pressure are affected.
For comparison, the same night's data is shown below in ResScan. That graph has the correct scale.
I'm using SleepyHead 0.9.3-0 beta on Windows 7 64-bit.