Marg try this:
Right click on Wombat2 in Travis's mesage, Click on "Save image as" This can then be saved to your computer, just rembeber where you saved it.
Next click on "User Control Panel top left of screen Then click on "Profile" next click "Edit Avatar, From Upload from your computer, click on "Choose File".
Then from the box that pops up find where you saved Wombat2.
Then click on Wombat2, then click on "Open" from the same box, then back to "User control panel", the file name should then be there and then you click on the "Submit button" All should be ok.
Hope I didn't tread on anyones toes here, and I hope like hell I got it right.
Luck Merlin