Thank you for your post. I am not able to replicate your issue. What I am doing is:
1. On iPad with FileMaker Go 1.2.4, I connect to a File shared by FileMaker Server.
2. The file has three records with two container fields each containing pdf documents.
3. On the iPad, I am able to pinch-zoom the container fields.
Please let me know what I am doing differently than you. More details could help identify what's causing your issue.
I am using a local file on the iPad.
I am trying to zoom the opened .pdf. I select the container field, and then select "open" from the pop-up menu. It is when the .pdf is being displayed that I cannot pinch-zoom (see attached image).
Thank you for the clarification.
Development and Testing have confirmed that PDF, CSV and Excel files cannot be pinch-zoomed with the standard iOS 5 Quicklooks programming interface. This issue has been reported to Apple, and we are working with Apple to find a resolution.