BUMP
Getting the same problem on my Windows 8.1/Windows 7/Windows technical preview triple boot desktop (in AZ), happens pretty much every other time i log out after repairing it. I've tried repairing and letting it download the missing assets (usually between 3~100 mb). Also been getting lots of crashes in champion select. However the corruption doesn't happen on my Dell XPS 13 running Windows 8.1 (only crashes and reconnect button not appearing when it crashes on the champion screen thing after champion select). I'm thinking it might have something to do with the old client patcher, but not sure.
mine began happening since 4.17, and if some rito guy happens to stumble upon this, i'm unable to attach a log when it happens since it's grayed out whenever this happens or if its patching.
the league bugs/crashes/disconnects are bloody ridiculous now
System specs (primary machine in AZ):
Windows 7/8.1/10 preview
AMD FX 8350 @ 4.8 GHZ (i've tried running on stock and 4.6)
Kingston HyperX 3K DDR3 4GB x 2
Kingston HyperX 3K SATA3 SSD 256 GB
Networks/Locations tried
COX - Scottsdale AZ
Verizon FiOS 50/50 mbps- Scottsdale AZ
Verizon xLTE hotspot - AZ, CA
AT&T mobile hotspot - AZ
T-Mobile LTE hotspot - AZ, CA, NY
Vodafone HK hotspot - Hong Kong
CMHK LTE hotspot - Hong Kong
PCCW 100/100Mbps Broadband - Hong Kong
NTT Docomo LTE Hotspot - Kyoto, Japan
Vodafone Broadband - Auckland (on KiwiPod, my OCE account)
Starbucks wifi in Auckland
(i travel a lot, Desktop in Arizona, Hong Kong and New Zeland )
-league was re-installed on 1/10/14 (so still on 4.17 i believe)
-Uninstalled and re-installed around 6 times
-Repaired client at least 3 times
-Re-installed/uninstalled Adobe Air
-Copied the riot games folder from XPS 13 and same problem on desktop and borrowed Surface 3, Lenovo miix 8 (won't run the game anyways but same issue with corruption after logging out and client crashing in champion select), bootcamp Windows XP MacBook Pro 15 inch 6,2.
My solution right now is every time i transfer a fresh copy from my external hard drive onto the desktop, play my games (and praying the client won't crash in champion select) and delete the folder after i finish playing and copy it again. Really frustrating and tedious. Rito please fix i seriously don't care about makeover of summoner rift. Maybe write a native client (not java or adobe air) and not use stream patching (i'd rather patch for 3 hours than download everything in 15 mins then have it give me some error that makes me want to tear my hair out while watching my brother play DOTA without a problem)?
Downloading DOTA right now, BF4 is updating so yea i had the time to type this