I have just done an upgrade of phpbb from 2.0.18 to 2.0.19 version. However, I must apologize for doing it so abruptly and causing slight inconveniences. I thought I was prepared enough and that it is small enough of an upgrade that it'll be smooth and easy. To keep the present modifications we have an easymod installed that is meant to make keeping track of mods even through upgrades easier, but I got a bit over myself there.
Anyway, the remaining issues will be fixed soon (like that duplicate distro "Using:" line on the left of your posts). I will make sure next upgrade is much smoother than this. I will take some more precautionary measures and make an announcement before doing it.
Forums should be fully functional right now. Those remaining glitches are to be fixed now.