i have a problem with image uploads. i tried to upload an image with has 4000x4000px and asize of 25MB. Upload works fine, but after upload where wordpress creates the thumbnails i get the error message: HTTP-Error. Nothing more. No thumbs are created. i connected with ftp to my site and in the upload folder there is only the orginal file.
so where is the problem?
i tried it with a rar archive of 30MB upload worked and no errors, also tried smaller images 1200x1200px and all worked fine.
the stuff in my php.ini is more than enough i think. memory_limit = 256M, upload_max_filesize = 50M, etc.
under Settings -> media in the admin backend i set the max file size to 6000x6000px.
someone there who could help?