ALV selection not displayed/shown

Hello,

I have a question concerning the ALV:

In NW 7.0 everything was fine and working, as of EhP1 the selection for one ALV is not displayed.

...the selection is done alright and also corresponding events are raised. Nevertheless there is no visual representation for a selection - meaning the yellow/orange highlighting of a selected line. It is neither done for the lead selection nor for "normal" selections.

Other ALV in the same application (though different component) work fine and as far as I can tell all are initilized similarly.

Does anyone know this effect and - most important - how to correct it?

Regards,

Robert