Miscellaneous Oddities Surrounding My Drupal Installation

Here I'll collect some minor issues and their solutions, which are often surprising...

Site Logo Color Is Wrong in IE

Drupal comes with site logos in .png format. If I create my own site logos in .png format and try to blend the background, then they look fine in FF, but the background is different in IE. Why does this happen?

The solution is to use .jpg instead.

Partial Picture Rendering

Sometimes, FF (don't know about IE) draws only the top half of a picture (especially the user pictures). This can be fixed by enabling PHP output_buffering 4096.

Broken Image Uploading

At some point, image uploading stopped working. This was shortly after updating Drupal, and I found out that I had forgotton to assign the new files to the drupal group.