Last weekend I updateted my weblog from version 2.1.2 to 2.3.3 and have some problems with creating thumbnails since.
Before the update everything worked just fine, wordpress automatically created thumbnails. After the update to version 2.3.3 wordpress stoped creating those thumbnails.
I updateted as mentioned op the wordpress.org website (ie deactivated the plugins first).
(And GD is working)
After uploading an image (< 100 kb) that part of the wordpress admin page turns white. The image is uploaded, but without a thumbnail, and only after pressing the button 'save and continue editing' the wordpress admin page turns normal again and am able to upload an other image.
Does someone recognise this or can someone help me out ?