MAKING ENDS MEET
July 4, 2010
Patrick Blindauer and Tony Orbach

Each clue below can be answered by what should be a two-word phrase, but, for the purposes of the puzzle, can be written as a single word that has two overlapping letters. For example, given the clue COLLECTIBLE BOOK, the answer could be LIMITEDITION, with the ED serving as the last two letters of LIMITED and the first two of EDITION.

1. Animal helper in herding
2. PC or APPLE mistake
3. Line that's 0 and 180 degrees longitude
4. It matters if the letters are small or capital
5. Facility that might feature a NASA space shuttle
6. Introvert or extrovert
7. Heavenly protector

Answers: 

1. ENGLISHEEPDOG
2. COMPUTERROR
3. PRIMERIDIAN
4. CASENSITIVE
5. SCIENCENTER
6. PERSONALITYPE
7. GUARDIANGEL