Hi,

Thanks for this solution, it was driving me crazy for a while.

I do have one suggestion for this solution.  I was experiencing a strange issue when I set the DummyTargetURL to ''; I would see a Page Not Found flash across my tab when I first clicked on it, then it would load the appropriate page.  If I changed DummyTargetURL to be about:blank (which renders a blank webpage) the Page Not Found message disappeared.

I don't know if anyone else had this strange symptom for the above solution, but if you did, I think this might help resolve it.

Again, thanks.

Mark

And the solution is:

The DummyTargetURL property of the webtab, which feeds the webtab's iframes.  The default property "BLOCKED SCRIPT''" creates this attribute tag:  src="BLOCKED SCRIPT''".   Delete the attribute or put in a reference to a local file and all is well.

I set DummyTargetURL to ''.  You have to use the single quotes.  If you just empty it, it reverts to default.

I don't yet know if this will have an impact of webtab functionality -  I suspect it won't but have asked Ifragistics support for a ruling on the question. 

This also explained why every infragistics.com page with a tab interface was painfully slow to load. A quick source check found the same attribute value.  My guess is that there a lot of webtab endusers out there with IE7 and Norton who experience the same - Ifragistics should probably take note and change the default (and the property on their site's pages).

Have there been any updates since October on this issue:

Ultrawebtab 8.3.20083.1009 on IE 7 with Norton IS version 15 Phishing Protection.

With phishing protection on, it takes 12-15 seconds to render a webtab with minimal tabs and no content in the panels.  With phishing protection on it takes, say, half a second.

 I don't think demanding our users turn phishing protection off is a viable option.

Thanks for sharing the solution in forums, especially for such a tricky issue. This will certainly be helpful for other people too.

Thanks again.