Image Magick Error: convert: Valid palette required for paletted images `/home/ozpolit/public_html/album/forum-attachments/thmb_1216515271505-0.png' @ error/png.c/MagickPNGErrorHandler/1642.

Image Magick Error: convert: Valid palette required for paletted images `/home/ozpolit/public_html/album/forum-attachments/thmb_1398781594129_50387-6.png' @ error/png.c/MagickPNGErrorHandler/1642.

Image Magick Error: convert: Valid palette required for paletted images `/home/ozpolit/public_html/album/forum-attachments/thmb_1398781594129_50387_001-6.png' @ error/png.c/MagickPNGErrorHandler/1642.