how did my url "?" become "w" or omega

Hello all,


I got another weird incident that I cannot find where and how dit it happen. After uploade to server, my link looks like this:
mypage?myval1=123&myval2=xyz. When I click on OK button, I returned to the main editor and my "url" variable used in fck_link.js contained correct information. However, when I switch to html mode..the char "?" changed to char "omega" (before I save the content ). After I hit "save" button, it changed to char "w". Anyone know anything about this?

So, insted of: mypage.cfm?myval1=123&myval2=xyz
it showed: mypage.cfmwmyval1=123&myval2=xyz

Thanks