Oracle Application Express (APEX) "submit" Button

We just ran in to the strangest problem. All of our buttons and standard tabs stopped working on a particular page. Parent tabs worked fine, but anything that relied on posting the page (javascript:doSubmit) stopped working. Neelesh Shah came up with the solution. One of our buttons was "submit"--all lower case. Usually a submit button in APEX is either SUBMIT of Submit, with at least one upper case letter. APEX automatically adds an id="" to all the buttons. As it turns out, id="submit" (all lower case) causes browsers to stop submitting (posting) pages. Just changes the value to Submit did the trick.