2.36: DPI properties not updated until save

[shortcipher]

After changing the DPI of a TIF in Image->Set DPI..., the changed DPI was not updated in Edit->Properties->Image until the TIF had been saved.

[helmut]

After changing the DPI of a TIF in Image->Set DPI..., the changed DPI was not updated in Edit->Properties->Image until the TIF had been saved.

First I wanted to write:
This is normal behaviour in XnView and not a bug. All actions/changes in "Image" menu are applied on the image loaded in memory. Changes are indicated in the title bar with an asterisk "*". You have to save your image to actually apply the changes that you have made.

But when re-readiing your bug report I see that there's really a problem:
In Edit >Properties > Image the changed dpi value should be shown and not the dpi value of the stored image which is no longer valid. I'd also say that this is a bug.