The collision between a Jetstar A320 and Virgin Australia 737 in 2013 at Melbourne Airport has now been solved by the ATSB. The official report is below, blaming ground staff for the incident.
https://www.atsb.gov.au/publications/investigation_reports/2013/aair/ao-2013-125/

http://www.heraldsun.com.au/news/victoria/melbourne-airport-ground-staff-blamed-for-3m-jetstar-virgin-plane-crash/news-story/1117807b68930a314ea95aff6f49e9f0