You need to setup svc.spellchecker.net in your hosts file to point to an invalid IP. In this way, the SCAYT scripts will not get loaded by the browser.
The problem here is quite serious, as any other script execution in the page is blocked while SCAYT scripts are not loaded and executed. This can be an issue with slow connections also, which can impact effectively on the load of editor files, when opening the styles combo, or any dialog, for example.
There may be a solution for that, but we need to understand if it really works. At runtime, SCAYT should create an <iframe>, compatible with the current page, and load all scripts into that iframe. I think that, in that case, the script loading time will not block the execution of other scripts in the page.
This impact all browsers.
