Try running cairo-clock. A black background is painted instead of transparency.
I guess the problem is that Wingo is using the CopyFromParent visual when reparenting client windows, which imposes whatever visual is being used for the root window on all client frame windows.
I seem to get a variant of this problem with docky and xcompmgr. A black space on the bottom appears then. Docky seems to run fine, although without the fancy graphics, when not using xcompmgr.
Try running
cairo-clock
. A black background is painted instead of transparency.I guess the problem is that Wingo is using the
CopyFromParent
visual when reparenting client windows, which imposes whatever visual is being used for the root window on all client frame windows.This issue is discussed in more depth for fvwm. A patch was provided that fixed this issue, but is no longer in fvwm today.