I do not know why USD is strong against AUD, but I can throw some light on why USD is performing soooo strong against Indian Rupee ( The USD has appreciated 25% within less than a year).
The truth is , in Indian financial market there has been a HEAVY presence of US institutional investors ( not only the big I banks, but scores of small investment firms as well).
Now , when the downturn happened and especially after the Lehmann episode, almost all US institutional investors started to build there cash reserve back in their home. As a result, they started selling their Indian holdings. They converted the rupee proceeds to USDs and took the money to their country.
This resulted in an enermous demand of USD and sudden flush of INR in the Indian forex market. Hence the appreciation of USD.
I do not know about the Australian situation, but this has happened in several countries where there is high presence of US institutional investors.