Marval - 11:55 am on Sep 26, 2004 (gmt 0)
I know I've brought this up a long time ago (about a year ago), but Google has been doing the same thing for English language vs. overseas (Europe and Asian language) indexes for "objectionable content" in the eyes of the current political climate in the US. They have removed at least 6 sites that I know of in the top 50 results for a keyword in the displayed English language (hl=en) SERPs although they are displayed in the index if you change the language to es or just about any other hl=value.
I did ask Googleguy about it back when he was a regualr contributor here, and was told that was part of their wanting to display "PG" rated results for that keyword. Sticky me for an example if you want to see both the algo changes that are made and an example of a manual placement due to this "political correctness" filter