SDP text editor don't work with Firefox 4.0-rc

SDP text editor don't work with Firefox 4.0-rc

In Firefox 4.0-rc don't work text editor in resolution tab,
Resolution is not saved and rich text buttons do not change text format.

Tested in SDP 7.6.0 and http://demo.servicedeskplus.com

Error occurs often but not every time.


Error Console in Firefox:
  1. Błąd: uncaught exception: [Exception... "Component returned failure code: 0x80004003 (NS_ERROR_INVALID_POINTER) [nsIDOMNSHTMLDocument.designMode]"  nsresult: "0x80004003 (NS_ERROR_INVALID_POINTER)"  location: "JS frame :: http://demo.servicedeskplus.com/scripts/thirdparty.js?8 :: initIframe :: line 5"  data: no]

  3. this._doc is undefined
  4. http://demo.servicedeskplus.com/scripts/thirdparty.js?8

--
Krzysztof