Opera plaintext button reloads page on submit

"Hi!
Yeah, it works now, the editor is load by Opera,
Thanks!

but . . . when I click "Switch to plain editor", the page is Saved! like pressing 'Save' button . . . no toggling to plain editor . . .
(and also : the "Available updates List" don't show the module updated . . . it warn to "Recommended version: 6.x-1.2-7 (2008-Apr-24))"