The Visa instructions for an American visiting S Africa state that one's passport must have at least 1 blank visa page available. He knew this, as he had carefully read the requirements. When he arrived in London to board his SA flight to Capetown, the airline refused to allow him to board. They said that although he did have blank pages in his passport, they were not specific "Visa pages" and he would not be admitted through immigration when he arrived in Capetown.

Just a warning to anyone going to S Africa - make sure you have blank VISA PAGES in your passport.

And people think US red tape is bad!