After updating Jenkis today to version 1.536 (2013/10/20) I can't save a custom icon for my jobs.
The already saved icons are displayed at the dashboard.
The already saved icons are displayed at the jobs config page!!!!
If I'm saving (modifying) a jobs config, the icon is gone, no mater if I set an existing icon.
I checked the jobs config.xml. The fallowing part is missing:

<jenkins.plugins.jobicon.CustomIconProperty plugin="custom-job-icon@0.2">
<iconfile>37acce5f49a03e918688b74bb2aa401fc00edf3e.png</iconfile>
</jenkins.plugins.jobicon.CustomIconProperty>

If I'm putting it back manually, the icon displays again. But then after a save from the UI, it disappears again.

I'm not sure about my previous version number. (I think) I used 1.532 (2013/09/23) with the custom job icon plugin and it was working well.