Created attachment 139724 [details]
In various variants of the notebookbar (e.g. tabbed compact, groupedbar full), when a shape is selected, Area Fill Style (.uno:FillStyle) appears with a white background below the two drop down menus and also the background of the color picker widget when color fill is selected.
Build ID: d09bdaaa660c40df241e6e1c0b8a3e905db85420
CPU threads: 2; OS: Linux 4.4; UI render: default; VCL: gtk2;
Locale: en-US (en_US.UTF-8); Calc: group
Interestingly I can confirm with Groupedbar full, but not with Tabbet Compact.
Tested using LO 188.8.131.52 / Windows 7.