Record size
All fine in designer view when design record size. When change to use mode the record size is regenerated to hit the lowest object fare most to right on the screen. The record size outside this is left i background colour.
Yes. En extreme workover of the Form/Record model awaken some sleeping dragons.
An automatic resize of Record object "fix" in DFW 6.x that had been switched off in 8.0 had gone in reverse and instead of the original intended behaviour of sizing the record object to the Form object it went size to fit.
This has now been fixed and will be available in the next release.
The short term fix is simply to style the form in the same colours as the record. As this is only a RT problem it will have no adverse affect on your applicaion.