opera -- multiple vulnerabilities

Opera reports:

It is possible to make a form input that looks like an
image link. If the form input has a “title” attribute, the
status bar will show the “title”. A “title” which looks
like a URL can mislead the user, since the title can say
http://nice.familiar.com/, while the form action can be
something else.
Opera’s tooltip says “Title:” before the title text,
making a spoof URL less convincing. A user who has enabled
the status bar and disabled tooltips can be affected by
this. Neither of these settings are Opera’s defaults.
This exploit is mostly of interest to users who disable
JavaScript. If JavaScript is enabled, any link target or
form action can be overridden by the script. The tooltip
and the statusbar can only be trusted to show the true
location if JavaScript is disabled.

Java code using LiveConnect methods to remove a property
of a JavaScript object may in some cases use null pointers
that can make Opera crash. This crash is not exploitable
and such code is rare on the web.