What's wrong?
I'm using NuSphere Pro 5.52 build 5220, Win XP SP2

The latest version is build 5223, chances are it's already fixed in that if it's a bug. I've never seen that behavior before.

I doubt if it is a bug in buld 5220. I am still using that build on XP SP2, and have not encountered this problem myself. My guess is that it is a problem on your system, like a weird font issue or something. In your shoes, Reghak, I would nevertheless follow Blizz's advice and see if the latest build does anything different.

if you can replicate this problem with as simple script as $a="hello world", please let me know. If it happens with a particular script(or scripts), please contact NuSphere Support team directly and provide all the details including phpinfo(), project settings, IDE settings and script sources.

Thanks in advance.