Personal dictionary for speller

Hello

Where should the file with personal words be stored by default? (I would like to review that list periodically and submit missing words to corresponding spelling package buglist).

Currently I add a new word by say pressing „Add to dictionary“ in KMail. The only place I can find this word later using grep is in .xsession-errors: QSpellEnhantDict::addToPersonal: word = 'mynewword' (lines above and below this one are about [akonadiserver] so I guess irrelevant)

Thank you

P.S. Fedora14, KDE 4.5.5.