I suspect that might be an issue in the the default button behavior when the action is Ajax.
If you could submit your eSpace (or a small sample that shows that problem) to our technical support team firstname.lastname@example.org I'm sure they'll be happy to look into it.
Are you using Internet Explorer or Firefox? Does it behave the same way on both?
I have seen some cases, only in Internet Explorer, where pressing Enter will completely destroy the layout of a page. One simple example is the Service Center home page, where simply pressing Enter in the search button will yield a completely messed up page, whereas clicking the search button will do just fine.
From a brief investigation I have made, it seems to be because Internet Explorer is not submitting everything it should. This seems to be related somehow to the existence of a form without a default button somewhere in the page - for example, the same example I give above will not cause a messed-up page if you do that in the eSpace list page.
To see if the problem is the one above in your eSpace, you can:
- Make the button default in you page (is default property);
- See if the problem also occurs in Firefox / Chrome / Safari.
Please let us know if that worked for you.