Hard to say for you, but if I remove my lockscreen theme, native kicks in and "should" still put my missed calls, voicemails, SMS, E-Mails and calendar items on lockscreen page without needing any theme.
I might yank my lockscreen theme out with SSH and see how the native version works, just for grins and giggles.
Since you don't like WB, maybe this is for you.
Oh, I see... Well I just have Gruppled installed manually now so it looks nice