I am getting the following error with IE9 and Firefox 26 with application express 3.2:
SCRIPT5007: Unable to get value of the property 'nodeName': object is null or undefined
apex_ns_3_1.js, line 589 character 10
This happens when I click the Gear Icon, then Filter, then I click the dropdown arrow under expressions and pick an expression from the list.
If I set (through IE Developer tools) back to IE8 mode, I don't get the error.