[Plugin: NextGen Gallery] Tag does not work

for example:
http://www.weddingelation.com/photos/browse/tags/hair/
http://www.weddingelation.com/photos/browse/tags/hair+short/
dont work, but
http://www.weddingelation.com/photos/browse/tags/short/ work fine.
and
http://www.weddingelation.com/photos/browse/tags/cake/
http://www.weddingelation.com/photos/browse/tags/cake+white/
http://www.weddingelation.com/photos/browse/tags/cake+black/
work fine too.

It’s problem with words: “hair” and “reception”

Tags:
white (89)
cake (52)
hair (14)
reception (11)
black (9)
short (2)