I have recently switched from FCP7 to Premiere Pro 6.
I have been using it for about a month with no problem but stumbled across one yesterday.
I am working on a project which I backed up using project manager so I can continue to work on the project at home this weekend.
The problem I found was in the title tool.
In my original project I had created about 15 titles, each on I had used "New title based on current title' and just re-typed the new title to match the previous one.
When I tried this from the project backup at home the copied titles were different aspect and size to the original.
I manually adjusted the settings to match my previous titles, but when I export the film the titles are a different size again on the Quicktime.
To get round this, I had to create the new titles in After Effects and import them in which worked fine.
I'm also using standard Helvetica, so it's not a problem with not having the same font on my Mac Pro and Macbook Pro
I understand if this is a simple error as I'm a newbie to PP but would be interested in any feedback why this is happening.
I've had this issue too when switching between machines. Titles that were correctly aligned and the correct size are suddenly different sizes and misaligned. I've submitted a bug report and would suggest the same.