When I set the StyleSetPath property using a root-relative URL (using a leading tilde (~)), I get this error--
"Cannot use a leading .. to exit above the top directory."

This occurs in any and all of these scenarios--

• Development environment (http://localhost/sitename)
• Production environment (http://www.domain.com)
• Set in web.config as <infragistics.web styleSetName="Default" styleSetPath="~/relativepath/StyleSets" />
• Set at Design-Time in WebPageStyler control properties
• Set at Run-Time in WebPageStyler.StyleSetPath property
• Set at Design-Time in any IG control with EnableAppStyling property set to "False."
• Set at Run-Time in any IG control in IGControlID.StyleSetPath, with IGControlID.EnableAppStyling = False.
• WebPageStyler control and/or other IG control added to a UserControl.
• WebPageStyler control and/or other IG control added to a web page.
  

In other words, there is NO situation where I can use a root-relative URL for the StyleSetPath property of ANY control without throwing the error.

Root-relative URLs work for each and every other control and property that normally supports it.

Root-relative URLs work for every Infragistics path property EXCEPT StyleSetPath.

The ONLY workaround I have been able to find is to use this syntax at Run-Time--
WebPageStyler.StyleSetPath = HttpContext.Current.Request.ApplicationPath & "/relativePath/StyleSets."

I must do this for EVERY page or UserControl where I need the StyleSetPath, since there is no web.config syntax equivalent to HttpContext.Current.Request.ApplicationPath, other than root-relativee (~/) URL.

This is clearly a bug. I can't find where to submit bug reports, so I sent it in as a support request, and I'm posting it here.