Hey jsw,
thanks for your comments to which I want to lose some words:
In the next release, I will change the output away from PNG to JPG, because it is simply better supported than PNG (thanks to Microsoft's IE that 96% of the surfers stick to, what I simply don't understand). Transparency will be then dropped again, but to be honest, the transparency has been very poor, anyway.
Unfortunately it is not possible to create a "true" picture with an own name, so that the browser will not recognize that this is "only" a script. Perhaps your BMP-issue will be solved when I have changed the script's output to JPG - we will simply see.
Concerning your Netscape 4.7x problems... I am sorry, but I will not put work into supporting an older and even more buggy browser than IE. I suppose the issue is located in the browsers technology - it seems that NS handels the URI differently than newer browsers which will lead to the problems. Unfortunately I can't provide another way to carry the needed variables to the fontizer-script.
One tip: upgrade, it's free
I am sorry, I don't want to seem sarcastic, but I will never be able to understand, why people don't upgrade after years that other, newer and better browsers exist...
I know that there are reasons (I myself have customers that use NS 4.x because of political reasons) why people use old browsers - but those people should not look at such prgressive and modern projects like phpwcms

. Their bad luck
- Jérôme