Also see:
http://www.flyertalk.com/forum/Forum94/HTML/000219.html

Hi all!

Another disadvantage of E-Tickets: My brother flew last night on AA from ORD to LGA. He had a reservation on a 4 PM flight, but that flight was cancelled. If he had a paper ticket they would have put him on the next flight...but since he had an E-Ticket, they refused to process his reservation in time for the next flight. Don't know if that's the fault of AA or E-Tickets in general...but I'd guess that, if AA's doing it, so is everyone else.

Never never an e-ticket internationally, esp to a 3rd World country. We had a disaster in Egypt with an e-ticket that TWA insisted on selling us in SFO. Flew in from Jordan to Cairo and we were not allowed in the transit lounge! No ticket. The customs and immigration guys never heard of an e-ticket, regarded it as a receipt. Had to exit the airport secure area, buy a visa for $30 and return. Was lucky even to get in since Egypt requires an on-going or return ticket for entry to the country!