This bug can be recreated with the following steps:

1. Minimize/hide the grid using the top-right image button.
2. Click a button (separate from grid) that unloads grid with .GridUnload() and re-creates it with different postData (“.jqGrid({…})”).
3. When the grid is re-created, the bottom pager has vanished and will not return unless you minimize and maximize again.

It appears that the minimized status is persisted for the pager even after the grid has been unloaded.