vim showing blank in konsole with transparent background

Hi guys,

My konsole works fine with transparent background. But when I start vim in it, everything becomes blank, only the cursor is still flashing. If I open or switch to another tab of this konsole window and switch back, everything becomes fine.

my vim color scheme is “lucius” with t_Co=256
konsole version 2.14
vim version 7.4
in KDE 4.13.3, openSUSE 13.1
any idea? thanks in advance