Netscape/Mozilla plugins in Konqueror compiled with GCC 3.1?

[SegFault_II]

I use Gentoo 1.3b since wednesday, and today I found that the netscape-plugins don`t work in Mozilla.
Then I read https://forums.gentoo.org/viewtopic.php?t=4753 and compiled the .so-file.
Mozilla now handles flash & co. correctly, but not Java (just as in the thread) and the RealPlayer-Plugin doesn`t work, too.
Now I finally merged KDE 3.0.2 and found, that Konqueror has problems with the flash-plugin, too.
Now I tried to rename /usr/kde/3/bin/nspluginviewer to nspluginviewer.bin and wrote a script /usr/kde/3/bin/nspluginviewer.
The content of the script is:

#!/bin/sh
LD_PRELOAD=/usr/lib/mozilla/libc++mem.so
./nspluginviewer.bin $*

But this didn`t help.
Any ideas?

Btw: Java works great in Konqueror (the first time for me).