What version of gallery are you using? I am using 1.3.4 and in the release notes I read that it fixed some issues with upload agent. I didn't start using the XP agent until 1.3.4 and it works fine for me. However, I don't use the resizing feature and I have no experience with the agent prior to 1.3.4
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-Rob Riccardelli
80GB 16MB MK2 090000736