I am using Eagle version 8.4.0 and I am having a problem with a component that I edited where my ground fill is overlapping the pads. The component is an LM78xx from the Sparkfun library. I changed the shape of the pads from round to long and rotated them 90°. When I updated my schematic/board the changes show up but the polygon fill for the ground plane did not change. I saved everything, closed and reopen the project and even deleted and recreated the polygon. It still has the overlap. I have made similar edits to other components on the same board, just changing the size of the pad--not the shape, and they work fine. Someone please tell me what I am missing... and thank you.
Neither of the suggested answers were able to solve my issue. I managed a workaround... I created a short trace under the pad, the length of the pad with a width of 1.92mm. This provided a gap which is almost perfect. I still would like to understand the issue and why it is a problem in the first place. As an additional test, I created an entirely new component using the long pads and it has the same problem.