TYPO3 Core

After upgrade to TYPO3 4.1.6 the bug 0006676 is still present.

It happens with RTE 1.5.5 (revision 3600) in wec_discussion extension.

The problem happens:
- Firefox 2.0.0.14 (on Win XP) - whenever a popup window is opened by clicking on a button of the RTE (link, image, about, etc.), the window stays open for only about 5 seconds, then closes automatically and causes the frame where the editing is taking place to reload.

- IE7, IE6 - popup window remains opened, but no action takes effect.

And the output of the troubleshooting mode:

[HTMLArea::init]: All scripts successfully loaded.
[HTMLArea::init]: Editor url set to: /typo3/sysext/rtehtmlarea/htmlarea/
[HTMLArea::init]: Editor skin CSS set to: /typo3/sysext/t3skin/rtehtmlarea/htmlarea.css
[HTMLArea::init]: Editor content skin CSS set to: www.my-host.com/typo3/sysext/t3skin/rtehtmlarea/htmlarea-edited-content.css
[HTMLArea::generate]: Toolbar successfully created.
[HTMLArea::generate]: Editor iframe successfully created.
[HTMLArea::initIframe]: Iframe baseURL set to: http://
[HTMLArea::initIframe]: Skin CSS set to: www.my-host.com/typo3/sysext/t3skin/rtehtmlarea/htmlarea-edited-content.css
[HTMLArea::initIframe]: Override CSS set to: www.my-host.com/typo3temp/rtehtmlarea_css_dffac98b3175880c8c50347c30aeac2a.css
[HTMLArea::initIframe]: Content CSS set to: www.my-host.com/typo3/sysext/rtehtmlarea/htmlarea/plugins/DynamicCSS/dynamiccss.css
[HTMLArea::initIframe]: Editor iframe head successfully initialized.
[HTMLArea::initIframe]: Failed attempt at loading stylesheets: [Exception... "A parameter or an operation is not supported by the underlying object" code: "15" nsresult: "0x8053000f (NS_ERROR_DOM_INVALID_ACCESS_ERR)" location: www.my-host.com/typo3temp/rtehtmlarea_htmlarea_d0ee2026ec3515a528a4a45515d92160-compressed.js Line: 1"] Retrying...
[HTMLArea::initIframe]: Failed attempt at loading stylesheets: [Exception... "A parameter or an operation is not supported by the underlying object" code: "15" nsresult: "0x8053000f (NS_ERROR_DOM_INVALID_ACCESS_ERR)" location: "www.my-host.com/typo3temp/rtehtmlarea_htmlarea_d0ee2026ec3515a528a4a45515d92160-compressed.js Line: 1"] Retrying...
[HTMLArea::initIframe]: Stylesheets successfully loaded.
[HTMLArea::initIframe]: Design mode successfully set.
[HTMLArea::initIframe]: All plugins successfully generated.
(issue imported from #M8200)