If you have customised your webtrees files, or are managing any custom add-ons for webtrees, you need to be aware that changes have been made in latest svn that will need to be reflected in most add-on modules and themes. The changes are effective at svn 14305, although there may still be further adjustments required.
Greg has described the changes in other posts:
There were two reasons for the changes.
To allow all trees to be private. This has been a frequent request. Now, when all trees are private, there are no tree names/titles or anything else visible.
Performance. I have changed the way we load all the tree preferences. We now load them in one big SQL query, instead of many separate queries.
For custom themes the change is small, but important. Where you might previously have displayed the Family tree title using "htmlspecialchars($GEDCOM_TITLE)" or similar, you should now use "WT_TREE_TITLE". Nothing more complicated than that, but the change must be made.
Custom modules may require more complex changes, so you will need to study other modules and to see what changes you need to make in your own code.
These changes also mean you can no longer tell users that your custom theme will work for both 1.3.1 and 1.3.2, unless you don't display the Family tree title in your theme at all.