The report in question wasn't hard to find: The Tobacco Industry and the Costs of Tobacco-Related Illness. A final section starting on page 119 entitled "Dissenting report by Senators Nick Minchin and Sue Knowles" does express a lot of disagreement with regulatory proposals out of a desire to see less government interference in general life. However, a comment on page 120 by Nick Minchin (and it is explicitly made clear that this opinion is only the opinion of Nick Minchin alone) reads as follows:
Senator Minchin wishes to record his dissent from the Committee's statements that it believes cigarettes are addictive (1.25) and that passive smoking causes a number of adverse health effects for non-smokers (1.34).
So....not a denial, but it seems to me a response of "not all the evidence is in yet" on the issue. I wonder if he still feels that way?
The dissent goes on:
The Committee's terms of reference did not ask it to reach conclusions on these controversial issues, and nor was sufficient evidence from both sides of the argument brought to bear. These are medical conclusions which it is inappropriate for this Senate Committee of inquiry to reach.
Senator Minchin briefly referred to this part in his Qanda reply when he claimed that his comments on smoking should be disregarded because the Senate Committee wasn't convened to address medical issues. This seems like a half-truth: to my eye, it's only the dissenters Minchin and Knowles who took issue with the scope of the Senate report's medically-informed decisions, specifically because they didn't believe that there was sufficient medical evidence of the reality of nicotine addiction and passive smoking. In 1995.
This might be worth keeping in mind when Senator Minchin makes claims about the supposed unreliability of current climate science on the question of anthropogenic global warming.