OP with the problem description and how to reproduce is on the .org forum.
https://wordpress.org/support/topic/conflict-with-gravity-forms-57/
It looks like 2.6.2 inadvertently strips out Gravity Forms <script></script> and <style></style> tags .
Reverting to 2.6.1 makes the problem go away.
See the screen capture for an example of the error.
