We are evaluating your product at the moment. In our product (www.targetprocess.com) we are using a lot of ajax based functionality so ajax support is critical. I used your Ajax-Support.aspx example (with minor modification) included into trial package to test CuteEdit+Ajax  support and faced an issue.

Test page: http://test.targetprocess.com/ajax-support.aspx.
Source code: http://test.targetprocess.com/ajax-support.rar

Steps that do not work in Firefox:

1. Type some simple text in Edit area and press "Buton"

Update panel updated but typed text has not appeared

2. Type some other text in Edit area  and press "Buton"

Update panel updated and text typed in step 1 has appeared

3. Press "Buton"

Update panel updated and text typed in step 2 has appeared

Is there a fix for this issue?