Has anyone else had one item overwrite another?

[dasymington]

Luckily this didn't result in one item overwriting another, but perhaps is gives a further clue to how it might happen.

As you can see from the picture there are 4 tabs open and the third from the left is the active one; but, although it has the correct item title in the tab, the item title on the form, and all the other contents of the item, are from the second tab.

I selected another item in the third tab and then went back to the one I wanted and, as I say, the correct contents were still there. Worrying, nevertheless!!!!