[Bug 39671] New: Wine 1.7.55 regression: buttons no longer visible

https://bugs.winehq.org/show_bug.cgi?id=39671

Bug ID: 39671
           Summary: Wine 1.7.55 regression: buttons no longer visible
           Product: Wine
           Version: 1.7.55
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Buttons with images are no longer visible in several desktop applications
previously running fine under wine 1.7:
* SplashID desktop
* Most Delphi applications using speedbutton instances

The buttons are invisible, although clicking (blindly) on their supposed
position reveals them.