That's really strange -- can you tell if it's switching recipe boxes on you (in the title bar)?
Let's try to narrow down what might be going on -- haven't seen this before.
My first guess is that it might have something to do with the program trying to import a recipe into a box that it cannot import into (e.g., it's hit its maximum capacity or it is read-only), or switching to a recipe box that for some reason it cannot read (perhaps it's become corrupted).
Can you try:
1) Try importing from the website into different recipe boxes, including brand new ones you create. Do you see the same behavior? Watch the title bar -- is it staying in those recipe boxes?
2) Try creating a new recipe from the toolbar, not via Website Import. Are you able to create a recipe, move to another recipe, and return to the one you've created, with it saved as expected?
3) Double check the full path of your recipe box, and make sure there are no apostrophe's in it -- e.g., "June's Recipe Box", or c:\documents and settings\steve's documents\my bigoven recipes\etc. This has been known in the past to create erratic behavior.
If you see this just in one recipe box, zip it up and email it to us and we'll take a look. Thanks!