to upgrade to specific versions of Trac.
+Due to some changes in the Wiki syntax, you may notice that certain parts of
+your pages no longer work as expected:
+ * Previously, links to images would result in that image being embedded
+ into the page. Since 0.10, links to images remain plain links. If you
+ want to embed an image in the page, use the [[Image]] macro.
+ * You can no longer use %20 in wiki links to encode spaces. Instead, you
+ should quote the name containing spaces
+ (for example, use wiki:"My page" instead of wiki:My%20page.)