I have run across this problem before but cannot remember what the solution was.
This is not happening on my machine but to another person I know. I am trying to get her to join AUGI and maybe this will be what gets her to do it.
If you zoom into the pdf on a 'M' or 'N' then you will see the pointy letters. It is happening in one drawing in one project. When I had her send me the problem file it worked good in my ADT.
We are both running ADT 2006. Any help would be appreciated. Thanks.