I've run into a curious problem with some photos I took with my N900 yesterday. To begin with I corrupted the file system on my memory card restoring some music tracks I deleted yesterday. I attached the N900 in Mass Storage mode, and I stupidly disconnected the N900 from the cable w/o unmounting the volumes on the PC. After that incident I found my Music directory had vanished, but the file space wasn't free up.

Anyways on the way home from work, I snapped a few photos which I saved on the memory card. I could view them, tag then, etc. w/o any problems. After reaching home, I tried to fix the file system on the memory card and failed. So I determined I had to reformat. So I copied off the DCIM directory off the memory card to my PC. I reformatted the memory card, and recopied the DCIM directory and recopied all of my Music again.

Fast forward to now... I tried to view the photos I took last night in the Photos app, but they don't show up in the All picture view. I can see the files in the File Manager. When I tried to open one of the photos in File Manager, it shows as a blank (black) picture in the Photo app. I took a new photo today and saved it on the memory card. That new photo is showing in the Photo app. I can view the old photos on my PC just fine. And I can even see thumprints of the old photos in the File Manager, yet nothing in the Photo app.

What's going on?

I had some photos come up black in the Photo app, then five minutes later I tried again and they loaded normally. No idea why.

Just a hunch...
You're sure you disconnected the cable from the PC? Since somehow the USB Connection locks the user files.

From my experience, some formats (jpg?) are easy to corrupt just by changing a small part of the file, which turn the whole picture black. Are you sure they were ok before you transferred to pc? If they look ok on the pc, try transferring again - maybe they just got lost in translation

https://bugs.maemo.org/show_bug.cgi?id=6170 or https://bugs.maemo.org/show_bug.cgi?id=6563 ?