The last official displaytag release is quite old and there is still a dependency on the old itext v1.x version. Thats why I created an up-to-date snapshot release of revision 1160 with additional patches. Here is a short changelog:

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reverted this change:
some fun with displaytag 1.3: java 1.4 and EL version not supported anymore
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r1154 | fgiust | 2008-12-27 14:41:37 +0100 (Sa, 27. Dez 2008) | 1 line

patches:
-suport for itext v2.1.5 (<a href="http://jira.codehaus.org/browse/DISPL-450">issue DISPL-450</a>)
-pdf export fixed (<a href="http://jira.codehaus.org/browse/DISPL-352">issue DISPL-352</a>)

Download source and binary.