No, the corrupted SIDE3 loader did not work on the 130XE.
To clarify, these were the steps:
*The loader was working on the brand new SIDE3 in the 800XL with U1MB, but I did not play with it before attempting the upgrade.
1. The upgrade to 0.29 failed using SIO2PC
2. The upgrade seemed to complete successfully using the SD card on the loader.
3. After rebooting, the SIDE3 loaded was corrupted and 800XL frozen (required power off/on)
4. Upgrading again using SIO2PC was unsuccessful (tried a few times)
5. using a stock 130XE, successfully upgraded to 0.22 using SIO2PC, then upgraded to 0.29 using SD card (just to test both methods)
So, I think original ROM on new SIDE3 was good to begin with. #2 above is what corrupted the ROM even though the messages showed that it had completed successfully (sorry, i did not get a picture of it). So, I would think it was a random case of corruption probably having to do with my 800XL.
Both U1MB and SIDE3 are working fine on my 800XL