Bug#586946: Preview of jpg files is broken in a strange way

[Frederik Schwarzer <schwarzerf@gmail.com>]

[Artur R. Czechowski - Mittwoch 23 Juni 2010 22:18:23] 
> Package: dolphin
> Version: 4:4.4.4-1
> Severity: important
> File: /usr/bin/dolphin
> 
> Hello,
> I'm trying to view a directory with jpegs using dolphin in Preview mode.
> All pictures are made by the same camera. Some of them are displayed as
> a thumbnails and some of them only as a jpg placeholder (icon with folded
> corner and the camera).
> If you need a sample to check if it works (or not) look at:
> http://blabluga.hell.pl/dolphin/
> IMG_6370.JPG is invalid (placeholder is shown)
> IMG_6377.JPG is valid (thumbnail is available)

IMG_6370.JPG is bigger than 1MB; IMG_6377.JPG smaller.
Maybe your preview settings do not allow previews of files
bigger than 1MB.

Settings -> Configure Dolphin ... -> General -> Previews

Regards