Yes I should have mentioned to those doing a challenge for the first time. You should start a new thread for your entry. The thread title should read "January Entry : Your Map Title Here" kind of style then when it gets archived you can see the Dec and Feb entries separate from all the Jan ones.
As usual I will try to keep on top of the thumbnails page. When you post your new WIP images as the map progresses it would be helpful if you put a :
### Latest WIP ###
as the last line before your uploaded image and then the thumbnailer script will see that image as your latest for the thumbs page. You can get away without the tag but if you or anyone posts any unrelated image then the last in the thread is used as the thumb one. You should vote on the thread but many people vote by looking at the thumbs images. I urge people to look at the threads this time because you wont see the reference maps to see how close the entry is otherwise.
I'll try to end the challenge as near as I can to 00:00am GMT on the 27th of Jan with 4 or 5 days worth of voting. Post into this thread if you need an extra hour or so at the very end or at least post something just before voting starts not to miss the dead line. Its happened too many times to mention before I upgraded the thumbs updater !