wheel - 2:10 pm on Apr 26, 2010 (gmt 0)
Yes, I'm getting broken. I published 5K pages a few months ago and Google was slowly indexing them. The site: operator was returning ever increasing numbers, into the thousands.
Today it returns 179 pages. Note that the rest of the 4800 pages are in fact original well written text, so if it's a quality issue, it's only based on backlinks (the 5k pages don't have many deep links).
I also checked another site I set up years ago that had 3 to 5 thousand pages on it, the pages have been indexed for years. Same thing, the site operator returns 229 pages.