That there is caused by java rather than swiftkit itself. I say that based on that we don't actually interact with the game in anyway that is all handled by the browser be that IE or Chrome. There is no real easy fix, I would give deleting your runescape cache a try or reinstalling java.
did you run the installer as an admin? and did the installer complete it looks like the cancel button has been press on the installer before it had finished
make sure that your screenshot setting is set to original and that your DPI setting in windows are set to 100%. http://windows.microsoft.com/en-au/windows/make-screen-text-larger-smaller#make-screen-text-larger-smaller=windows-8
It is mac only hence why it is in the mac section of the KB. There is no windows version because there is no need for it. The official client still uses java just like Swiftkit. So either way you have it on your system. The reason why we have it with the mac version is because Apple discontinued support for java.
I have spoken to jmods about this this and many other things. The third party rules are out of date and they are working off a more up to date unpublished version. As i'm still in the uk I have not had the chance to discuss this with the rest of the swiftkit staff. So I cant give you our position on this just yet.
We are in talks with Jagex about the legality of this we should know more after runefest. At which point we will make a decision. At present our interpretation of the Runescape Rules prevents us from adding this and we have conflicting messages from Jmods. At RuneFest we intend to resolve this once and for all.
This isn't an issue with SwiftKit or Imageshack i believe its because IPB and vB are modern forums and use rich text editors. Instead of using the bbcode try just using the direct link and clicking the image button.
What version of RS are you playing? Old school, RS3, RS3 Beta. None of us have been able to replicate this. I think preventing it from happening in the first place would be better than having it as an option.
http://services.runescape.com/m=rswiki/en/Macroing%2C_and_third-party_software 2. Software that monitors, modifies or decrypts the communications between our game applets and our game worlds. That would fall under this category which is not allowed.
Sy_Accursed is correct in that swiftkit is just a frame around google chrome or Internet explorer we have not interaction with anything inside that frame. We would never attempt to intercept, decode or alter any content inside the frame. So this is just a straight forward no from us. Any UI changes or suggestions need to be taken up with jagex on the official forums.