I am using K2 backend and have selected the image tab. Browsed image from local disc and uploaded. This works fine and the image are displayed to me in the image tab.

 

Close the article and then open it up again.

Select the image tab and make a mark at "Check this box to delete current image or just upload a new image to replace the existing one" to delete the image. Then save the article and you will notice that image are deleted.

If i now select another image from local disc to display, something strange happens.

Backend it shows the initially image i had displayed, but when i look at the page frontend the new (and correct) image is visible.

 

Even if i close the article and opens it up again, it displays the first initial image backend, but the correct one frontend. This is a bit confusing, cause i can never be sure which image i am displaying :-)

 

Joomla v. 1.5.5, K2 latest stable version (v.2.2), latest JCE