I sometimes have problems with attachments from Crunch. That's why I include a mediafire mirror
You're not the only one, and PS3Crunch's attachments system is shite for large (10MB+) files, so you're better off using Mediafire or another file-hoster.
Instead of me being a complete and total dick and a prick, I should be on my best behaviour!
Hmm...I tried both links and both ones kick me back to the XMB (I'm on 3.40). The problem is that the CORE.SELF file isn't turning into the genesis_plus_gx.SELF. This happened last time, but redownloading solved it. I'll have to do that.
Just for fun, I tried moving the CORE.SELF file out of the directory and hoped it would use the older genesis_plus_gx.SELF from the previous installation. No luck. Then I tried manually renaming the CORE.SELF - nope. Copied the new cores from the new installation and tried to use them with the old version - worked last time, but not now. By new I mean the date stamp is later; "new" doesn't necessarily mean updated.
But as I said, hopefully it's just a bad download. I could blame my phone, but this also happened to me on a PC.
Also, it's nice to see I'm not the only one on a pre-3.55 system.