Filemaker Pro 11
When you open the program and open the file, then go to a layout and click in a field, typing is delayed and doesn't show until you click into another field, all links work fine.
The file has no issues, recovered clean, other computers are able to open the file and work with no delays at all. seems to be computer and filemaker specific.
Have uninstalled and reinstalled the program.
I've seen delays on my XP system also. In my case, it seems to be a function of how many different FileMaker windows are also open (and a number come from FileMaker server with data that may be updated by other users). If I close some windows, it seems to improve. My personal theory is that FileMaker is trying to keep all the windows fully updated even though only one window is actually visible.