That being said -- I was thrilled that both devices are working beautifully this morning without the silliness of blank screen crashing. I was so desperate yesterday that I was parsing the diagnostic logs for iBooks trying to figure out what was causing the white screen / crash to home! As long as a sign-out/reboot/sign-in works when it gets quirky, I can deal with it. Annoying but fixable
Excellent! Same here. Devices working their usual way. I think this will be a permanent fix -- at least I'm HOPING -- because it seems to be some sort of synchronization issue with the iTunes ID. This would perhaps explain why some people are experiencing it and others aren't -- and therefore suggesting to perform a restore, which, in my experience, has NEVER helped any issue I've ever had.
It also makes sense with the way Apple has been sort-of-kinda-in-an-odd-kind-of-way "siloing" media that syncs: apps, e-books, music. While the .1 updated fixed some things with Music, it may have knocked the IDs off kilter. Thus, iBooks would crash as it tried to phone home; purchased apps would show as needing to be downloaded; and Music would be ... Well, it would just be worse than it usually is.
In short, knock on wood that this is fixed for us.
Sidebar on the DRM

I either buy books via Amazon (physical or Kindle), or check them out from the local library digitally. I'm not a fan of Kindle's formatting and justification, so I end up de-DRM'ing the ones I buy so I can read/sync them in iBooks. The Overdrive Library book app can be annoying as well, so on those I usually check out, de-DRM so I can read in iBooks, then delete when read and returned.
I don't mind DRM, but I'd like to choose the application I read in and have it on at least two (iPad/iPhone) devices. Sometimes the DRM becomes too limiting, but I know it's necessary in some cases.
DRM is DEFINITELY limiting. It's one of the reasons I don't use it. It is what it is, though. Alas, our digital age!
I was never a fan of Kindle formatting either! Do you use Calibre for your de-DRM-ing needs? It's a good app. Other than iBooks, I use Calibre to store some ebooks (as well as to test and convert and edit...).
My gal gets ebooks from the library. I never have. I should, but I'm just a buy-the-book kind of person. Between free books and sales I find on BookBub and other services, it rarely amounts to much. So, it's all cool.
(Shameless self-promotion: If you see any ebooks you might like on my web site, please let me know first as I'll DM you a coupon code for a discount.)
With that, read on crash-free!
A.