Platform: C#, VS2010, .Net Framework 4.0, AjaxToolkit v4.1.7.1213, using HTML5
At random I keep getting duplicate TAB panels generated on my aspx page, not all the time but it happens after configuring a textbox, label, and or validation control inside a tab panel; I'll change some property on a control inside a tabpanel and all of a sudden errors start appearing in the debug window saying that I have TabPanel ID(xxx) already inuse.
Attempts to fix this include removing the AjaxToolkit from the project, download a new one and reinstall; this works for awhile then starts up again.
This is on a new ASPX page with nothing more than a div header with a few labels and text boxes with and an image, then a body div tag with a scriptmanager and a 6panel ajax tab control - many thanks for any help with this.