After talk with freemangordon and his wonderful help and guidance on attempts to fix it, it seems that problem may be affecting people, that have different filesystem for crucial partitions (/dev/mmcblk0p2, or mydocs). For example, I use ext4 for /dev/mmcblk0p2

It seems, that indeed, system-services from latest cssu is to be "blamed".
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As requested by freemangordon, syslog dump:
http://sebsauvage.net/paste/?f3aac1b...uRgpvL8iEF3B8=

...from device with *modified* /etc/default/mount-opts, to look like this:
http://sebsauvage.net/paste/?019702d...P4kQ1iFkvSacY=
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This is how syslog from device where /etc/default/mount-opts *wasn't* modified:
http://sebsauvage.net/paste/?f5a7546...Zrmcu+nptO0nk=
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Last but not least, for convenience, this is snip of part that seems relevant:
http://sebsauvage.net/paste/?24862e7...SOVhJ9Td7LWz0=

Hope it helps in debugging.

/Estel