JTabbedPane slow first new tab

I have noticed something strange with my Swing user interface. I'm going to describe the symptoms and hopefully someone can help me narrow the problem to a bit of code that I can post. Currently, I have no idea about which part of my code may be causing the problem.
I have a JTabbedPane with one tab that contains a JTable. This part of the GUI is displayed at start up. If a user opens a text file, the text is added to a JTextArea and then displayed in a new tab. The first time that I open a text file there is a noticeable delay before it is displayed. Every subsequent file that is opened is displayed very quickly in a new tab. Why would there be such a delay with the first new tab that is added but not the other?
Thanks
Message was edited by:
Jstats

Sounds like initialization is your enemy. You should use a profiler to check.

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MS,
Try copying one existing TAB and use that, this happens only when there is improper xml content. You can open the xml in the browser/visual studio for better clarity and then try making the changes. Doing IIS Reset will be required but in the meanwhile you
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