Wouter Swierstra wrote:

I can't manage to upload files to the Haskell wiki. I've tried different browsers, different internet connections, different machines, different operating systems, and different user accounts - all without success. Is this a new anti-spam measure?

This is slightly annoying. I was looking to release the next Monad.Reader on the wiki. Thanks for any advice,

It turns out that both PHP and Apache have limits on file uploads. The PHP limit was set to 2MiB, and there was also a PHP-specific Apache configuration that limited POSTs to 0.5MiB. So Apache responded to this upload with a 413 error. MediaWiki (perhaps wisely) does not add its own upload limit, though it does issue a warning confirmation for files bigger than 150KiB. I've set both limits to 20MiB, and switched off MediaWiki's warning. I've uploaded Wouter's file to [[Image:TMR-Issue13.pdf]]. -- Ashley Yakeley