JIRA development kit doesn't compile plugin-customfield-sample

jpdk:build-examples:
build:start:

clean:clean:
    [delete] Deleting directory /home/christo/work/jira-development-kit/examples/plugin-customfield-sample/target

clean:

java:prepare-filesystem:
    [mkdir] Created dir: /home/christo/work/jira-development-kit/examples/plugin-customfield-sample/target/classes

java:compile:
    [echo] Compiling to /home/christo/work/jira-development-kit/examples/plugin-customfield-sample/target/classes
    [javac] Compiling 4 source files to /home/christo/work/jira-development-kit/examples/plugin-customfield-sample/target/classes
/home/christo/work/jira-development-kit/examples/plugin-customfield-sample/src/java/com/atlassian/jira/plugin/customfield/example/LastUserCommentedCFType.java:53: cannot resolve symbol
symbol  : method getUser ()
location: interface com.atlassian.jira.issue.comments.Comment
            User commenter = lastComment.getUser();
                                        ^
1 error

BUILD FAILED
File...... /home/christo/work/jira-development-kit/maven.xml
Element... maven:reactor
Line...... 169
Column.... 41
Unable to obtain goal [java:compile] -- /home/christo/.maven/cache/maven-java-plugin-1.5/plugin.jelly:63:48: <ant:javac> Compile failed; see the compiler error output for details.
Total time: 5 minutes 22 seconds
Finished at: Wed Nov 29 13:42:28 EST 2006