Version:           1.0.0-beta6 (rev.: 1038897) (using KDE 4.3.2)
Installed from:    Ubuntu Packages

1. select a file in the album view in a local collection
2. open rename
3. chose a name that already exists in that album
4. press ok

result:
The dialog that the name already exists is correctly displayed, but both images aren't displayed. Instead you see a warning that the images aren't on the local computer. Clicking this message successfully loads the images.

desired result:
images on local computer are directly visible in this dialog.