Most applications with "as-you-type" spellchecking only check and (if necessary) highlight a word when the whole word has been typed (ie, when you've typed a space or punctuation after it).

In Kmail however, it highlights while the word's being typed, so until I finish typing a word it's nearly always highlighted as a mis-spelling.

Is there a way to change this behaviour, or should I raise a feature request?