Comment 9 for bug 207330

I encounter the same issues.

When running from terminal, gthumb reports in a very high frequency:

"Warning: Photoshop IRB data is not padded to even size"

It seems some thumbnails won't be created due to some error while reading the jpeg file, and gthumb endlessly repeats trying to recreate the thumbnail.

Same thing sometimes happend for video files.

It also happens in nemo sometimes, where the thumbnail shows a waiting symbol endlessly while hogging the cpu.

I guess gthumb (and nemo) would have to handle thumbnailing errors more gracefully (do not retry).