Some numeric traits and metrics are better shown as whole numbers rather than doubles. e.g Free Files = 35.0, is kind of annoying since you cant have a fraction of a file so Free Files = 35 would be better. We don't need to change the type we used to transmit the data, just format it better.
This bug was previously known as http://jira.rhq-project.org/browse/RHQ-638
This is sort of a duplicate, but basically we don't format traits and that is not planned to change.