Forum Moderators: open
Unfortunately it is very common with DMOZ.
It tends to take about an hour these days to get one submission to take sucessfully.
Apart from mindless resubmitting, the only practical advice I can give is to have a copy of you submission, so that you can cut and paste it into another form when the previous one goes phut.
The ch.dmoz.org option does not help as submissions are referred back to dmoz.org