Am 24.12.2010 um 12:53 schrieb Alan BRASLAU:

On Friday 24 December 2010 11:54:17 Taco Hoekwater wrote:
On 12/24/2010 11:48 AM, Andreas Harder wrote:
\index{test}test

\ignorespaces could be possibly be added to \index in your case,
but that does not solve this conceptual problem: what is actually
being indexed in that second line? Not the word on the left
(as that could be on a different page), neither the word on the
right (as that could also be on a different page).

I have understood that the correct use of \index{}
is immediately following the word to be indexed, as in:
test\index{test}

The wiki (http://wiki.contextgarden.net/Registers#Example) suggests it the other way round …?

Andreas