Builder release notes can be found through jira.adaptavist.com/browse/builder
Builder 3.x Release Notes
Summary
Important Notes
Requirements
Builder 2.0.x and above require that you install two additional open source plugins (developed by Adaptavist) for correct operation:
- Page Information Tools plugin:
- Use Version 1.2.2 for Confluence 2.0.x-2.2.x
- Use the latest version for Confluence 2.3.x and above
- Content Formatting Macros plugin:
- Use latest version for all Confluence versions
These plugins are maintained on an ongoing basis by Adaptavist as they are required for the Theme Builder plugin.
Release Notes
Frequently Asked Questions
Added by 
oh really?
it'd be nice to see what's been changed in 3.0.2 etc
http://jira.adaptavist.com/secure/ReleaseNote.jspa?version=10779&styleName=Html&projectId=10000&Create=Create
I've asked James to add the release notes pages to the website - for now use the URL Alain posted.
Note that the IDs used throughout the HTML for Builder changed in (I think) v3.1.1, with one correction issued in (I think) v3.1.4. The changes were necessitated by an Atlassian HTML change which meant there were duplicate IDs present on the page, in HTML IDs should be unique.
Unfortunately the Builder ID changes will break any custom CSS or custom JS which relied on the old IDs, here is the list of find/replaces I had to do throughout my CSS/JS. If you have written no custom CSS/JS, then you will probably not need to worry.
Old ID => New ID
#document => #atb-document
#accessKeys => #atb-accessKeys
#header => #atb-header
#headerdiv => #atb-headerdiv
#menu => #atb-menu
#menudiv => #atb-menudiv
#navigation => #atb-navigation
#navigationdiv => #atb-navigationdiv
#leftSidebar => #atb-leftSidebar
#leftSidebardiv => #atb-leftSidebardiv
#leftSidebar-slider => #atb-leftSidebar-slider
#title => #atb-title
#titlediv => #atb-titlediv
#content => #atb-content
#contentdiv => #atb-contentdiv
#rightSidebar => #atb-rightSidebar
#rightSidebardiv => #atb-rightSidebardiv
#rightSidebar-slider => #atb-rightSidebar-slider
#footnote => #atb-footnote
#footnotediv => #atb-footnotediv
#footer => #atb-footer
#footerdiv => #atb-footerdiv
It should be noted that using html entity id's is not reccomended ... internally builder uses the classnames, and we would advise that users do the same.
The html id's are primarily useful for creating right-click context menus in conjunction with the {menubar} macro.
do you have any notes for 3.1.3 and 3.1.4?
jira.adaptavist.com/browse/builder - you can browse to them here.