Nice to meet you. This is my first topic. I'm sorry by my english.
It happens that I have been using portable versions of Iron and Chromium. So far so normal.
The strange thing is trying to make Iron as Default browser in Windows XP, the following happens:
Windows XP set to Chromium as its Default browser from the XP Start Menu.
Then, I changed it from the dropdown list of browsers available on the Properties for the Main Menu. And this is where it gets the more freaky thing.
WinXP set up a SRWare Iron as its Default browser, but when clicking there, XP opens a browser that happens to be the fusion of Chromium and Iron, it takes features from both, and it's a different profile of my Iron from Portable folder.
I deleted the folder of Chromium portable and its related folders in Documents and Settings. But the issue continues.
Windows XP recognizes SRWare Iron (as Default browser), like a virgin profile of Chromium or Iron, but not my Profile.

Tested Versions:
Chromium 20.0.x
SRWare Iron 18.0.1050.0