Javascript error(s) for insert image

Using latest version of module (admin screen says: Revision: 1.90.4.16 $ $Date: 2007/02/25 20:02:44) and ver 2.1.0 from moxiecode. Everything shows up fine but whenever I use a feature that requires launching a new browser window (e.g., insert image, insert table, etc.) nothing happens except for a javascript error: "win.document.defaultView has no properties ../sites/all/modules/tinymce/tinymce/jscripts/tiny_mce/tiny_mce.js Line 1." Problem occurs in both IE and FF.

Here's the offending code snippet according to firebug:

init([], Object action=insert inline=yes)tiny_mce.js (line 1)
getControlHTML("mce_editor_0", body.mceContentBody, "mceImage", true, null)editor_template.j... (line 1)
init(function(), 3, [Object undoRedoLevel=true isTinyMCE_Control=true, "execcommand_callback", "execCommand", 5 more...], Object)tiny_mce.js (line 1)
init(Object undoRedoLevel=true isTinyMCE_Control=true, "execcommand_callback", "execCommand", 2, [Object undoRedoLevel=true isTinyMCE_Control=true, "execcommand_callback", "execCommand", 5 more...])tiny_mce.js (line 1)
init(Object undoRedoLevel=true isTinyMCE_Control=true, "execcommand_callback", "execCommand")tiny_mce.js (line 1)
init("mceImage", true, null)tiny_mce.js (line 1)
init("mceImage", true, null)tiny_mce.js (line 1)
init("mce_editor_0", "mceImage", true, undefined, true)tiny_mce.js (line 1)
[Break on this error] function TinyMCE_Engine(){var ua;this.majorVersion="2";this.minorVersion="1.0";t...

Any suggestions???