I haven't had probems with digital camera pictures in court (yet) - it is only backing up your written documentation.
When comencing, it would put you in an even stronger position to get the tenants to initial and date the photos when signing the condition report.
Likewise, when taking photos at the end, either get tenant to initial and date and/or include a current dated newspaper. (a newspaper also helps give size comparison to items photographed)
If queried - as previously stated, you could offer to do a Stat Dec. It would also help, if you were starting down this avenue, to also have someone else who could back up the validity of the photos. (ps. quotes for repairs, cleaning, etc would be also proof)
As always - it is better to negotiate with the tenant direct and not be involved with the delays of the court. Negotiating first also puts you in a stronger position if you have to go to court (providing you have documented the negotiations) Good written documentation, especially the written condition report signed by the tenant is a CRUTIAL document (even for direct negotiation with the tenant). Any photos do strenghthen its validity.
It is though great that the court is there when you have to deal with shonky people.
JAM