I've just come across a problem, which upon further checking, occurs in both the January and December versions.
I have a customized screen with 10 sections. In the customizing editor, when the first sections is set to "show", some rows at the bottom of the section do not display on the screen, and this occurs whether or not the rows are blank or have data fields and objects in them. When I then set the section to "hide", the rows that originally displayed are hidden, as they should, and the rest of the rows that weren't originally displayed are then shown. The fields and objects can be edited, moved, or deleted as usual, but the add/delete rows and column controls on the section bar are gone. Deleting blank rows in the normal ;'show' mode seems to move them into this other area.
The whole section appears to display normally in actual operation.
I hope you can help with this one.
Rolf