We've pushed a minor re-code of the back-end, which we hope'll help with some site time-out issues, though we'll have to monitor site activity over the next few days to figure out how effective it was.
If everything's gone well, you shouldn't notice any changes in site functionality, but if you run into any new bugs or unexpected behaviours (such as broken images, avatars, or pages), please file a ticket describing the actions you took to get the error and we'll look into it ASAP.
Thanks for your patience as always while we iron this out.