There’s definitely some kind of bug. I tried on 8. It doesn’t show me other peoples records, it completely crashes out my home page and then only a blank screen shows when I select opportunities that aren’t mine in the dashlet. I have to go to my user preferences and re-set my home page to make it work again. I tried it twice. Each time it crashes out the home page to white screen. I’m a couple of versions back from current on my test version 8, so I’m thinking this is a bug.
Okay, that makes sense. I don’t crash out, though I do get the charts of others. If I click on the chart to see their opportunities page I get sent to the Opportunities list view but can only see the stuff I’m an owner of (which is as expected).