When I launch spell checker from RAD Editor on my development PC it works fine, but on my web server I get a 500 error with the following message in a dialog box:
Telerik.Web.UI.SpellCheckHandler.axd
Telerik.Web.UI.SpellCheckHandler.axd
Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection.
I am not using a custom dictionary, only the standard ones.