title: Why does Magento keep only the first 1000 products in a category, after saving the category?
body: <p>Using Magento's back-office, after saving a category which was linked to many products, only the first 1000 products (or 2000, or x000, depending on host configuration) are kept.</p>
  
  <p>All other category/product links are deleted from the <code>catalog_category_product</code> table in the database.<br>
  This occurs even though no checkboxes have been unchecked in the products grid (Category Products tab).</p>
  
  <p>No error message is displayed or logged.<br>
  Tracing data posted from the browser to the server doesn't reveal any missing product IDs, but even if you check more products on the back-office grid, when finally saving the category, the server only keeps the first x000 and removes other IDs...</p>