Left on the Web v4.0.1

Not all that interesting probably, but here's a short update on Left on the Web.

I just deployed version 4.0.1 of Left on the Web to the server. It's a minor update, a bugfix release. Just wanted to share some findings:

• Caching of Flickr and Ma.gnolia has been improved. I am using the sfFileCache class of symfony to do the caching, and I was not manually setting the lifetime of the cache (assuming a reasonable default value was set). But it seems there was no time out on the cache, it just kept on living. Thinking back, this actually makes sense: Let it live until the cache gets cleared if you don't specify a lifetime. But my change has been now to specify a lifetime, so that you actually see some new photos and links pop up.
• To save a bit of bandwidth, I have changed the header image from a single header.php that streams from a directory, to a little css magic in the header. I've done this because the header.php could not be cached (else I would not get the wanted random header effect) which causes quite some bandwidth usage. With the css magic, I now inject a random image filename from the same directory into a css rule in the header of each page. This will allow each image to be cached by the browser without losing the random header.