I work with a company that provides a web-based platform for online trading. We've recently launched an iPhone application.

I've noticed a UI problem in one of our pages, however, this problem reproduces only on 1 iPhone, and not on others. We have both 3G and 3GS versions (problem happens on the 3G). All machines run on the same iOS version, and may have little differences in terms of hardware (e.g. memory).

I'm wondering if you could give me a direction as to how I can isolate this problem and identify its origin.

If you need additional information about the problem itself, post back and I'll specify further.