Some plugins (eg. PrettyPhoto) cause an infinite loop of errors in Firefox (tested on 3.6.4 and 3.6.8).

The problem is on line 4691 (jquery-1.4.2.js):

var defaultView = elem.ownerDocument.defaultView;

if ( !defaultView ) {

return null;

}

var computedStyle = defaultView.getComputedStyle( elem, null );

There must be a test if elem.ownerDocument is not null.

Simple workaround is to rewrite code to:

var defaultView = elem.ownerDocument;

if ( !defaultView ) {

return null;

}

defaultView=defaultView.defaultView;

if ( !defaultView ) {

return null;

}

var computedStyle = defaultView.getComputedStyle( elem, null );