In Version 4:4.5~20101014.1185761-1maemo1.1185672 I can create empty contact groups ("New Contact Group"->OK). These are shown in the list (separated by thin gray lines), but cannot be viewed. If in an otherwise empty folder two of them are created, weird behavior in maintenance view (probably first-item-wrong issue).
SVN commit 1202264 by tokoe: Enable the save button only when valid group name has been entered. BUG: 254251 M +2 -0 editorcontactgroup.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=1202264