The error indicates that it's found an inconsistency between the indicated overall size of the dictionary data, and the combined size of the individual entries. Does auto-complete still work? If so, it may be that the data isn't structured as I'm expecting (in which case, please could you send me a copy to maemo at robinhill.me.uk), otherwise it's probably a corrupted file (in which case, hitting "Save" in Auto-Complete Editor will write out a new file that it thinks is consistent).