M42 Logo is missing at reports with Matrix42 Software Asset & Service Management console configured over https only.
The problem is in SSL settings. the issue can be reproduced in https/SSL environment only.
In the Reporting Services log there is an exception:
An error occurred retrieving the external resource 'https://localhost:443/SPS/images/ReportsLogo.png'. The underlying connection was closed. Could not establish trust relationship for the SSL/TLS secure channel. webserver!ReportServer_0-1!2114!04/22/2013-15:59:11:: INFO: Processed report. Report='/M42/EN/Service.
To solve this, you should have the Console client SSL certificate correctly installed on reporting services server (in trusted certificates).