When the administrator of my remote server upgraded from php 4.3.1 to 4.3.2, all my images dynamically generated with gd started to behave strangely.
I installed the upgrade on my local system, and the same happened with my images there.
So far, I have found that 'imagecopymerge' doesn't work properly, as the background image is replaced by black. That is, a 50% merge between two images results in the top image being darkened and the bottom image not showing at all.
Furthermore, I am using Johan Persson's Jpgraph, and it seems to have problems with transparency and colors under the new php version.
Any ideas?