Any updates on this problem? I still get the same issue.
Open the spellchecker from a Microsoft Ajax Modal PopupExtender the Spell Check is behind the dialog
Tried this in my code
#RadWindowWrapper_<%= RadSpell1.ClientID %>dialogOpenerSpellCheckDialog
{
z-index:20000 !important;
}
#Master_cntplhMainContent_Master_cntplhMainContent_RadSpell1dialogOpener_Window
{
z-index:20000 !important;
}
#Master_cntplhMainContent_Master_cntplhMainContent_RadSpell1dialogOpener
{
z-index:20000 !important;
}