In CS5, when I select more than one image to open together, only the last image in the selected group opens. Also, when I select "new" to open a new page on whitch to paste multiple copies of an open image, the open image deletes. Have never had this problem in previous versions of PS and version CS3 that I have kept until I get CS5 to function, works fine completing these functions. I couldn't find any setting in preferences to resolve this issue.
I am using CS5 on a Mac running Snow Leapord OS10.6.8