Victorian upper house Labor MP Kaye Darveniza has been lumped into the Craig Thomson affair after a press release sent by Health Services Union secretary Kathy Jackson listed the MP as its author.

Crikey can reveal that copies of the release, sent to a small coterie of journalists on Monday afternoon, contained Darveniza's name in the "properties" tab on the attached PDF. It shows that the original Microsoft Word document was last saved at 2.21pm on Monday.