I have noticed a strange problem when using Google XML Sitemaps in conjunction with Gravity Forms. I have noticed that when Google XML Sitemaps is active, I can no longer add or delete fields from the GF Form Editor.
When trying to delete a field, a dialog box is displayed saying:
"Ajax error while deleting field"
I am using WP 3.2.1, a Theme Hybrid Prototype child theme as well as the following plugin versions:
Google XML Sitemaps v 3.2.5
Gravity Forms v 126.96.36.199
GF User registration add-on v 188.8.131.52
I have also noticed that a similar conflict occurs with Google Analytics for WordPress v 4.1.3 as well as with WP Email Login v 4.1.2. However, in those cases, one cannot add fields, but one can delete fields.
Please note that all the other Gravity Forms functionality still works, however, as mentioned, in the form editor, you cannot add or delete a field with Google XML Sitemaps active.