I have been using swiftkit for 3months now and I haven't gotten any problems until now.

As I start swiftkit it don't show any errors, but when I click Play RS it starts to load and there comes this box.'

Jscript Character is valid. I have uninstalled java many times and swiftkit too but the problem continues to come.

And I have IE9 updated.

Is this a javascript error you are seeing?

 

If so, this is due to the ads served on the website and is unrelated to both internet explorer and java it self, you can attempt to follow the steps at http://kb.swiftkit.net/question-internet-explorer-script-error.html to disable them although depending on the errors this may not always work.

I would also try clearing your Internet Explorer cache, as it may still be trying to load something that was specific to IE8 that is still cached.

I had already marked those IE Debugging and the problem still comes. And I haven't ever used IE but I did clear all from there

http://gyazo.com/380a811c8492c273bad57c0a71a3d989

(Microsoft JScript -mistranslatio...)

(Character is not valid)

What happens if you open runescape in Internet Explorer?

Worked normally, no errors or anything. Not sure, but I think that resolved my problem :o

Now as I started Swiftkit no Jscript errors or anything. Thanks