I have a site to which I'm regularly adding new pages, some HTML, some aspx. I regularly update and submit my sitemap to google to reflect this.
Google has been visiting every day recently and re-indexing existing pages but not adding any new ones, it's just stopped at 123 pages. There are about 300 in the sitemap. I have test crawled the site, and tested the sitemap and looked on webmaster tools (no errors) and there's nothing I can see that's causing this.