Im trying to add following domain : photo-booth-hire.uk.com
with no luck.
Funny story. If you check this domain name with UTF-8 Decoder
http://software.hixie.ch/utilities/cgi/unicode-decoder/utf8-decoder you will see that there is hidden extra symbol at the end of name:
U+0070 LATIN SMALL LETTER P character
U+0068 LATIN SMALL LETTER H character
U+006F LATIN SMALL LETTER O character
U+0074 LATIN SMALL LETTER T character
U+006F LATIN SMALL LETTER O character
U+002D HYPHEN-MINUS character (-)
U+0062 LATIN SMALL LETTER B character
U+006F LATIN SMALL LETTER O character
U+006F LATIN SMALL LETTER O character
U+0074 LATIN SMALL LETTER T character
U+0068 LATIN SMALL LETTER H character
U+002D HYPHEN-MINUS character (-)
U+0068 LATIN SMALL LETTER H character
U+0069 LATIN SMALL LETTER I character
U+0072 LATIN SMALL LETTER R character
U+0065 LATIN SMALL LETTER E character
U+002E FULL STOP character (.)
U+0075 LATIN SMALL LETTER U character
U+006B LATIN SMALL LETTER K character
U+002E FULL STOP character (.)
U+0063 LATIN SMALL LETTER C character
U+006F LATIN SMALL LETTER O character
U+006D LATIN SMALL LETTER M character
U+0026 AMPERSAND character (&)
U+0023 NUMBER SIGN character (#)
U+0038 DIGIT EIGHT character (8)
U+0032 DIGIT TWO character (2)
U+0030 DIGIT ZERO character (0)
U+0037 DIGIT SEVEN character (7)
U+003B SEMICOLON character (
Or as raw characters:
photo-booth-hire.uk.com
So, try to write this name manually but not copy-paste.