19th November 2016, 5:00
EUREKA !!! 
leszek, you are a genius [& a helpful genius, what's more]. You have solved it for me!
You were right that i don't use LUKS, only ecryptfs. I chose to boot from my Maui2 ISO usb-stick & run your command therein the Live system. Errors were found & fixed:
Code:
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
maui@maui:~$ sudo fsck.ext4 /dev/sda3
e2fsck 1.43.1 (08-Jun-2016)
home contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Inodes that were part of a corrupted orphan linked list found. Fix<y>? yes
Inode 5242958 was part of the orphaned inode list. FIXED.
Inode 5243232 was part of the orphaned inode list. FIXED.
Inode 5637299 was part of the orphaned inode list. FIXED.
Inode 5644099 was part of the orphaned inode list. FIXED.
Inode 5644198 was part of the orphaned inode list. FIXED.
Inode 5644247 was part of the orphaned inode list. FIXED.
Inode 5644249 was part of the orphaned inode list. FIXED.
Inode 5644250 was part of the orphaned inode list. FIXED.
Inode 5644251 was part of the orphaned inode list. FIXED.
Inode 5644283 was part of the orphaned inode list. FIXED.
Deleted inode 5644344 has zero dtime. Fix<y>? yes to all
Inode 5644615 was part of the orphaned inode list. FIXED.
^[[A^[[A^[[APass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(2105376--2105384) -(2105472--2105569) -(2105576--2105599) -2105664 -(2105666--2105695) -(2105728--2105786) -2106125 -(2110507--2110529) -(2110632--2110668) -2120459 -2127311 -2128521 -(9496864--9496886) -(21039446--21039570) -22554401 -22583010 -(22727783--22727787) -(26712064--26712092) -(28444944--28444955) -(28444962--28444964) -(30838944--30838966) -(30839296--30839426) -(31641600--31643647) -(31707136--31711231) -(31715328--31717375) -(31744000--31746047) -(31750144--31752191) -(31850496--31852543) -(31971328--31973375) -(31977472--31979519) -(32053248--32053810) -(32921344--32921599)
Fix? yes
Free blocks count wrong for group #64 (17813, counted=18094).
Fix? yes
Free blocks count wrong for group #289 (32739, counted=32762).
Fix? yes
Free blocks count wrong for group #642 (25439, counted=25564).
Fix? yes
Free blocks count wrong for group #688 (23193, counted=23194).
Fix? yes
Free blocks count wrong for group #689 (1089, counted=1090).
Fix? yes
Free blocks count wrong for group #693 (26018, counted=26023).
Fix? yes
Free blocks count wrong for group #815 (7714, counted=7743).
Fix? yes
Free blocks count wrong for group #868 (15397, counted=15412).
Fix? yes
Free blocks count wrong for group #941 (27169, counted=27323).
Fix? yes
Free blocks count wrong for group #965 (25561, counted=27609).
Fix? yes
Free blocks count wrong for group #967 (11846, counted=17990).
Fix? yes
Free blocks count wrong for group #968 (3580, counted=7676).
Fix? yes
Free blocks count wrong for group #972 (4056, counted=6104).
Fix? yes
Free blocks count wrong for group #975 (2662, counted=6758).
Fix? yes
Free blocks count wrong for group #978 (11994, counted=12557).
Fix? yes
Free blocks count wrong for group #1004 (1857, counted=2113).
Fix? yes
Free blocks count wrong (26416597, counted=26436482).
Fix? yes
Inode bitmap differences: -5242958 -5243232 -5637299 -5644099 -5644198 -5644247 -(5644249--5644251) -5644283 -5644344 -5644615
Fix? yes
Free inodes count wrong for group #640 (3543, counted=3545).
Fix? yes
Free inodes count wrong for group #688 (178, counted=186).
Fix? yes
Directories count wrong for group #688 (609, counted=608).
Fix? yes
Free inodes count wrong for group #689 (1717, counted=1719).
Fix? yes
Free inodes count wrong (9622154, counted=9622166).
Fix? yes
home: ***** FILE SYSTEM WAS MODIFIED *****
home: 216426/9838592 files (2.9% non-contiguous), 12886621/39323103 blocks
maui@maui:~$ sudo fsck.ext4 /dev/sda3I thereafter [nervously] performed a "normal boot" &... it booted normally
-- oh yes, at last.I make the following remarks:
1. I realise that it's impossible for you to know what specifically caused the corruption, but could you pls give me an idea of the sorts of things that generically might do such damage?
2. Curses to that 2nd Maui splash-screen with its vanishing text. I suspect that IF that text would not always vanish, so i could have read it, then i could have solved this fault all by myself on the same day it happened, without needing to bother anyone.
3. The ongoing support from Maui to your Users is simply outstanding. I sincerely thank you.