In SR7, when you have multiple expressions in a gauge chart, un-tick the first to be 'Text as Pop-up' but tick the second, third etc. to be so and then in the Presentation tab un-tick the 'Pop-up labels', the labels don't appear. However, in SR10 the labels for the second, third etc. expressions do appear when hovering over the chart with the same settings.
I've tested this with exactly the same application on both, with 2 expressions, 3 expressions etc. The functionality is the same regardless of test settings, in SR7 they don't appear when hovering over, in SR10 they do. Unsure if this is an intended change (read through notes but couldn't see anything referring to this, also it doesn't sound like it should be correct) or unintended!