NullPointerException when posting/updating comments through the SPI

<?xml version='1.0' encoding='UTF-8'?><error><code>NullPointer</code><message xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true" /><stacktrace>java.lang.NullPointerException
	at com.cenqua.crucible.model.Comment.setCreateDate(Comment.java:98)
	at com.atlassian.crucible.spi.impl.DefaultReviewService.updateComment(DefaultReviewService.java:985)
	at com.atlassian.crucible.spi.impl.DefaultReviewService.createComment(DefaultReviewService.java:978)
	at com.atlassian.crucible.spi.impl.DefaultReviewService.access$1100(DefaultReviewService.java:112)
	at com.atlassian.crucible.spi.impl.DefaultReviewService$12.doInTransaction(DefaultReviewService.java:800)
	at com.atlassian.crucible.spi.impl.DefaultReviewService$12.doInTransaction(DefaultReviewService.java:797)
	at com.atlassian.fisheye.spi.TxTemplate.execute(TxTemplate.java:137)
	at com.atlassian.crucible.spi.impl.DefaultReviewService.addGeneralComment(DefaultReviewService.java:796)
	at com.atlassian.crucible.spi.rpc.RestReviewService.addGeneralComment(RestReviewService.java:745)
...