Fair enough, these things have to be done. Will it affect the image upload function at all? That's the one that always seems to cause grief after maintenance on forums like this.
Also just flagging for anyone mid-investigation this weekend - if you're out doing fieldwork Saturday and planning to post findings in real time, worth downloading anything important beforehand just in case the window runs longer than expected. Happened to me on another forum years back, lost a decent chunk of notes when the site came back up on a different version.
Appreciate the heads up from the mods anyway. How long is "a few hours" roughly, anyone know? Trying to work out if I should schedule my crop circle thread post for Friday night instead.