I've ran my stack up a bit playing tight and solid; table was fairly standard, but a wild Australian player has joined the table who's raising every other hand. He seems to be reasonable postflop though. Other players are unremarkable.
I have been playing very tight for a few orbits.

I get [Tc] in the BB. Aussie player raises to $3.50. MP, CO and button all call, SB folds. MP and CO have a full stack, button is short with about $25. I don't know this shortstack but he's been pretty aggressive. I make it $22.

Thoughts? My only worry was the button, but I couldn't think of a hand with which he would call me that he wouldn't squeeze with himself...

eh....I don't like it at all

because the aussie player is likely to call and he has position on you. Plus say the Aussie calls and one other calls, all the sudden the pot is HUGE and no one is folding.

I think you need a stronger hand to do this with.

Most likely you took it down preflop but I still don't like it here for some reason, of course I don't squeeze at all out of position, I try to do it on the button or cut off only unless I have a decent hand

IMO there is no need for a squize in 100NL, the games are not so aggresive to make it with marginal holdings. So I don't like it, call, see a flop and outplay them postflop. Don't forget that better player has bigger edge postflop, rather than preflop!