This happens on IE 11 only so far (OS=windows 8.1). When you make the textbox visible to false, it causes javascript error. Please fix this bug. (sample attached).
Comments: Thank you for sharing your experience. This issue will be fixed in the future release. Related changeset [3f2a2942a0ca](http://ajaxcontroltoolkit.codeplex.com/SourceControl/changeset/3f2a2942a0cad30559640d5fa1f1f29be0f74ca9)
Comments: Thank you for sharing your experience. This issue will be fixed in the future release. Related changeset [3f2a2942a0ca](http://ajaxcontroltoolkit.codeplex.com/SourceControl/changeset/3f2a2942a0cad30559640d5fa1f1f29be0f74ca9)