Character encoding in paths

I'm trying to embed KRPano using SWFObject, and passing the Sphere and Preview filename via a JS parameter.

I'm trying to generate correctly sized images and previews using phpThumb, but it uses some URL parameters to pass details to the resizing script, e.g.

phpThumb.php?src=/assets/images/equi/towers-03.jpg&w=1000&h=500&q=15&fltr[]=gray&fltr[]=blur|10

However when I try and pass this in via SWFObject, some of the parameters seem to be stripped off. Is there any documentation about what characters KRPano doesn't like? I think the equal sign is being removed. Even URL encoding the params don't seem to work. Any ideas?

Here's the code:

swfobject.embedSWF("krpano.swf", "pano",  "960", "480", "9.0.28",  "swfobject/expressInstall.swf", 
                            {pano:"krpano.xml", sphere:"/assets/util/phpThumb/phpThumb.php/4000x2000;/assets/images/equi/towers-10.jpg", "preview.url":"/assets/util/phpThumb/phpThumb.php/q=25;fltr[]=gray;fltr[]=blur|10;1000x500;/assets/images/equi/towers-10.jpg"}, 
                            {allowfullscreen:true, bgcolor:"#ffffff", allowscriptaccess: 'sameDomain'}, 
                            {id:'pano', name:'pano'});

The default format for passing params to PHP thumb (standard GET params) doesn't work - this alternative format does work for the sphere, but it is the = character that is causing problems. KRPano seems to truncate the preview URL at the first = so it actually tries to call:

/assets/util/phpThumb/phpThumb.php/q

Encoding the = doesn't seem to help.

Ah, thanks Klaus - I'll continue trying to solve it too, sorry for jumping to the conclusion it was KRPano's fault!! Thanks very much for your help,

great!

do you know of any workaround with the current beta version?