Hi,
I figured this months ago and it's still there in the latest version (7.0.5).
When using special characters in the URL (like German ä, ö or ü) and trying to edit content in a HTML module (using the "Edit Content" link in the bottom of the module) gives you a Runtime Error. So the only option is using the "Edit Content" link in the module menu on top.

Any ideas when this will be fixed?

Thanks,
Harald