One use case I currently have is "get all the hosts with same error in the last report", quite useful when we know how to fix something on a bunch of servers presenting the same issue.

It would also be helpful if it was possible to search text in the report.

For example, if there was a yum install error "Couldn't install package foo",
then I can search for "foo" and select "With Error" to find only such reports.

Comparing report entries will require a restructuring of the database as the logs are held in a serialized record and are not easily searched

Paul Kelly wrote:

Comparing report entries will require a restructuring of the database as the logs are held in a serialized record and are not easily searched

it seems that this is also required for proper support of 2.6 release, as the reporting internals has changed.