Just a suggestion, download just the base Rom first then make a backup so you can fall back to a clean install. Then download from this post all the extras.
On version 0.7 there were a few people myself included who could not install the Gapps fix at the same time as the Rom.
People have also had problems not wiping when coming from 0.7.0. Mainly not being able to get passed the green android to sign in. Though people have had more problems with ROM Manager, so I suggest booting into either SPR or clockwork and manually installing that way.
Last night I posted a really dumb question - where is GEM settings? However, I had (I thought) installed .8.4. Checked all the boxes in ROM Manager, including backup and data and cache wipe. Came up with a phone with no apps, none of them reloaded but I thought I had .8.4 - hence the dumb question. However, GEM Settings were nowhere to be found and the phone was acting weird. Restored from a backup and did the whole thing again. Restored again because the phone was acting odd and I needed some sleep.
Got up this morning and tried it 2 more times through ROM Manager - carefully checking all the right boxes. Lost root and - finally - checked the version. I had Sapphire .7 unrooted with no apps :icon_evil:.
Finally went through Clockwork - installed .84 and GAPPS. Wow - everything worked and most of my apps installed. Flashed Nextang and all is well again.
So - sorry for the really dumb question last night but I was really baffled as to why I could not find GEM settings.
Love Sapphire, glad that it all works, and would suggest that no one try to use ROM manager to install the update.
I had similar problems with the 0.8.4 update. My initial attempt was when I got a notification in the status bar about sapphire 0.8.4 update. clicking the update from the notification drop down takes you through the script to download the rom, kernel, and gapps, ect. But I think something is wrong with that script the notification uses, since after trying to update via the notification 2x resulted in my version still being 0.7.0... basically it didn't downloaded the rom, cause I could not find it in any of the clockwork subfolders. So it just reflashed gapps, kernel, and market fixes right over previous versions (when flashing a rom, /system is wiped out... in this case it wasn't since a rom was never flashed).
after clearing cache in rom manager, and retrying to download the rom from within rom managager (and not from the notification), it downloaded the rom. but upon flashing my market would instantly FC, and it wouldn't let me install some select apps from titanium backups. fix permissions didn't work. so i restored to my 0.7.0 nandroid backup. note that it finally flashed to 0.8.4 after 2 previous failed attempts.
today, i decided to make one more attempt. this time no issues flashing over 0.7.0 w/o wipe. I suspect that the first 2 failed attempts (from update notification) messed it up the previous night.