repercussions

Sam Ruby has an interesting piece on how breakdowns in abstraction
layering can cause tricky problems:

http://www.intertwingly.net/blog/1677.html

QNames and syntax variations both create some interesting waves.

He also points to a nice analogy from Mark Nottingham:

http://www.mnot.net/blog/2003/12/06/qnames_are_evil

It's good to confirm that issues derided as mere aesthetic blotches are
capable of causing real problems for sophisticated tools - and users.