I am using Fedora 20, Marble reports 1.7 using KDE 4.12.2.

Setup:  I put the dgml file into the openstreetmap folder, the kml file goes in the placemarks folder, and the Rabet goes in the bitmaps folder.

Launch Marble for the first time, and you will see a yellow push pin.(firstlaunch.jpg)

Close Marble.

Open Marble for the second time.  Rabet is no longer a yellow push pin, Rabet is simply a yellow dot.(secondlaunch.jpg)

How to correct:

At the directory: /home/user/.local/share/marble/placemarks/ simply delete the file Rabet_local.cache and the yellow push pin will return the next time the program is opened.

The cache file needs to be deleted prior to every launch in order to have proper operation of points of interest.

Reproducible: Always

Steps to Reproduce:
1. Place the files in the appropriate directories
2. Launch Marble
3. Close Marble
4. Launch Marble again
Actual Results:  
Designated point of interest bitmaps only appear on the first launch

Expected Results:  
Designated point of interest bitmaps should properly appear every time the program is launched, without having to hunt down and delete .cache files.

The ability to toggle KML files independently within dgml is a fairly new feature, this problem makes that feature much less useful the more points of interest appear on screen.  Imagine a few hundred yellow dots on screen in a relatively small area without a color coding or shape variance for identification.