Version:           0.10.0 (using KDE 4.3.3)
Compiler:          x86_64-pc-linux-gnu-gcc (Gentoo 4.3.4 p1.0, pie-10.1.5) 4.3. 
OS:                Linux
Installed from:    Gentoo Packages

I used the import (Ixus 55 but it doesn't matter i think) with filename rename and because i switched version I used 'ISO'. Unfortunately, my filesystem where images are stored is FAT32 and filename with ':' is forbidden on such FS. I saw that transfer failed but didn't find any hint about problem that occurred.
I had to strace digikam, that gave me the clue:
stat("/mnt/images/voyages/2009-irlande/2009-07-31/photo-2009-07-31T18:13:02.JPG", 0x4f5e4b8) = -1 ENOENT (No such file or directory)
lstat("/mnt/images/voyages/2009-irlande/2009-07-31/photo-2009-07-31T18:13:02.JPG", 0x7ffff83b6090) = -1 ENOENT (No such file or directory)
rename("/mnt/images/voyages/2009-irlande/2009-07-31/.digikam-camera-tmp1-2734IMG_0992.JPG", "/mnt/images/voyages/2009-irlande/2009-07-31/photo-2009-07-31T18:13:02.JPG") = -1 EINVAL (Invalid argument)
unlink("/mnt/images/voyages/2009-irlande/2009-07-31/.digikam-camera-tmp1-2734IMG_0992.JPG") = 0

It's ok for me (i switched to Advanced and choose format suitable for this FD) but i think that a 'normal user' would not strace digikam to find what the problem is.

The idea behind this bug report is to show/explain user errors that occurred during import (could be interesting to test with more common failures, such as FS full, but it might occur before rename). I could take a look at code if my case is just related to rename(), that is, lacking a report, a catch or something like this and all the architecture is ready (i.e. opening window, filename list, and error type...).