Excel charts not updating properly in PowerPoint

[StoryAngel]

I have some Excel charts pasted as links in PowerPoint and regularly add new info to the Excel sheet and update the charts no problem. However, just today, the y-axis on a couple of the charts is sitting right in the middle of the chart (instead of intersecting at the correct point). The chart looks fine in Excel. The scale on the axis looks fine. But the exact same chart in PowerPoint is messed up. This doesn't make any sense! Any suggestions?

 

[Diffy]

Did you try re-copying and pasting?

 

[StoryAngel]

Yes ... even tried copy -> paste link in a new slide (in a new PPT) but it's the same thing. Weird.

 

[StoryAngel]

I'm rebuilding the charts. There seems to be no logical explanation why the data has suddenly screwed up after months of it being fine. Just one of those gremlins I think...