It probably has to do with trying to "apply KDE defaults to non-KDE apps", which means it uses xrdb to apply X defaults that are supposed to mimic the color, font, and other settings that you have set for . However, experience tells us that this usually breaks things, particularly if you have carefully tuned the X resources of your non- applications.
The official solution for 1.x is click the K button, select Settings->Desktop->Style and disable the "apply KDE settings to non-KDE apps" checkbox. For 2, click the K button, select Preferences->Look and Feel->Themes->Style and disable the apply fonts and colors to non-KDE apps checkbox instead. If the new setting does not seem to stick, make sure you have clicked OK directly without clicking Apply after making the change. If it still refuses to work, there is a brute-force solution: rename or delete the $KDEDIR/share/apps/kdisplay/app-defaults directory. This will prevent from finding the X resource files it applies, and solve the problem. You have to exit your session and log back in for everything to return to normal.
If you do not want to, or cannot rename or delete the system-wide app-defaults directory, you can always copy it to your personal directory (e.g. $HOME/.kde/share/apps/kdisplay/app-defaults) and then edit/add/remove files to taste.
loads slow because it is statically linked with and has to load all the widgets, etc. when it loads.
What websites are you visiting? applets will often cause to crash. Since most people use applets for spinning buttons instead of something useful, just turn off in .
When you run , try using the -install switch e.g. netscape -install &. This will force to allocate its own colormap which would hopefully solve the problem.
You need to create a .kdelnk for , then edit it (using , right click and go to Properties) and select the right type for s (in Application tab pick text/html and text/sgml). Then select Edit->MIME Types from the menu, enter text and edit the properties for html and sgml: in Binding tab select the default application in the list box (since you have added the appropriate type to 's .kdelnk file, it should appear there).