Tip:
download a program called Irfanview.
View images w/that program.
Go to Options...Properties/Settings. Click on JPG / PCD / GIF on the left side.
UNCHECK the box to "Auto-rotate image...."
Now view your side-ways pictures. Click "r" or "l" keyboard button to rotate to the right way. His "s" to save.
Now post only those saved pictures that are in the right orientation.