I have your latest jslint plugin and the latest checkstyle plugin running on the latest weekly Jenkins (1.526). Your plugin runs great and I do get the list of errors, but when I click on the details tab on the Checkstyle page, I see:

foo2.js:69, , Priority: High
Line too long.

No description available. Please upgrade to latest checkstyle version.

foo2.js:101, , Priority: High
Line too long.

No description available. Please upgrade to latest checkstyle version.

Any ideas? I see this for all message types, not just Line too long.