I found M's bug with the SHELL section duplication in er_registry.txt file processing during the 2.9.5 upgrade.
Its /usr/bin/do_updates.sh, M forgot to add SHELL to the always_update...
Code:
echo "Rebuilding registry to new version: $registry_key"
# semicolon separated lists of registry sections
always_delete=""
always_update="\
VERSION;\
MODE_CATEGORY;\
DOWNLOAD_HISTORY_CATEGORY;\
SEARCH_RESULT_CATEGORY;\
RECENT_DOCUMENTS_CATEGORY;\
USER_APPLICATIONS;\
BROWSER;\
IPDF;\
APABIMOBI;\
IMAGEVIEWER;\
SETUP;\
PROFILES;\
EBA;\
EXTENSION_INFO;\
ICONS_GRAYSCALE_16"
I haven't tested it to see if it can clean up after itself if you add the missing SHELL entry and force a re-build.