The tag lib doesn't match the dtd and therefore doesn't build on my system.

Index: /home/chris/Documents/magnolia-all/magnolia-taglib-cms/src/main/resources/META-INF/cms-taglib.tld
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— /home/chris/Documents/magnolia-all/magnolia-taglib-cms/src/main/resources/META-INF/cms-taglib.tld (revision 6051)
+++ /home/chris/Documents/magnolia-all/magnolia-taglib-cms/src/main/resources/META-INF/cms-taglib.tld (working copy)
@@ -6,8 +6,8 @@
<tlib-version>2.1</tlib-version>

<jsp-version>1.2</jsp-version>

<short-name>cms</short-name>

+ <uri>cms-taglib</uri>

<display-name>cms taglib</display-name>

• <uri>cms-taglib</uri>

<description>Core tag library for CMS</description>

<tag>

<name>mainBar</name>