I've got a report/sub-report is basically a list of activities, and their sub-activities. To make the report a bit easier to read, I've added a light grey color as the alternate backcolor for both the main and subreports.
The rows alternate colors properly, until they encounter a record where the subreport contains records. In those cases, the parent record retains the background color of the previous record.
I've played around with a variety of settings, but cannot get this to operate the way I expect. I've attached an image (with most of the page blanked out to hide proprietary information) so you can see what I mean. Rows 2 and 13 are the ones which are not working properly.