communicator-dmotif-45 4.5-1: Error at first start

[Stefan Möller <moeller.mail@online.de>]

After installing the communicator-dmotif-45 4.5-1 and all depending
packages, I received the following message at the first start: 
--- 
ERROR: /usr/lib/netscape/45/communicator/plugins/libnullplugin.so:
undefined symbol: FE_GetToplevelwidget
Can't load plugin
/usr/lib/netscape/45/communicator/plugins/libnullplugin.so. Ignored
Warning:
Name: openOrBringUpBrowser 
Class: XfeButton
Creating an active drop site with no drop proc.
Error: Cannot perform malloc 
--- 
Somebody have a solution to this?

TIA 

Stefan Möller, Kiel 
Germany