diff --git a/iiab-install b/iiab-install
index 43851997c..baa40c55c 100755
--- a/iiab-install
+++ b/iiab-install
@@ -9,8 +9,8 @@ ARGS=""
 CWD=`pwd`
 OS=`grep ^ID= /etc/*release|cut -d= -f2`
 OS=${OS//\"/}
-MIN_RPI_KERN=4.9.59-v7+    # UPDATE THIS SOON...when Raspbian's Oct 2019 kernels are finally fixed (https://github.com/iiab/iiab/issues/1993 etc)
-MIN_ANSIBLE_VER=2.9.0
+MIN_RPI_KERN=4.19.79       # Can be further updated if necessary, when Raspbian's Oct 2019 kernels are more officially fixed such that running 'rpi-update' will no longer be nec soon, see: https://github.com/iiab/iiab/issues/1993
+MIN_ANSIBLE_VER=2.8.7      # Ansible 2.8.3 and 2.8.6 have serious bugs, preventing their use with IIAB.
 
 if [ ! -f /etc/iiab/local_vars.yml ]; then
 
diff --git a/roles/2-common/tasks/packages.yml b/roles/2-common/tasks/packages.yml
index 89b3bad4e..35f55f499 100644
--- a/roles/2-common/tasks/packages.yml
+++ b/roles/2-common/tasks/packages.yml
@@ -63,3 +63,10 @@
       - usbutils
       - wget
     state: present
+
+# 2019-10-31: roles/kalite crashed without the following python-virtualenv -- weirdly python3-virtualenv was installed on Raspbian (not sure why) but insufficient
+- name: Install package python-virtualenv for KA Lite and Calibre-Web, on older OS's (raspbian-9, raspbian-10, debian-9, debian-10, ubuntu-16, ubuntu-18)
+  package:
+    name: python-virtualenv
+    state: present
+  when: is_raspbian_9 or is_raspbian_10 or is_debian_9 or is_debian_10 or is_ubuntu_16 or is_ubuntu_18
diff --git a/roles/mysql/tasks/main.yml b/roles/mysql/tasks/main.yml
index 966148a22..254c29bfc 100644
--- a/roles/mysql/tasks/main.yml
+++ b/roles/mysql/tasks/main.yml
@@ -69,7 +69,7 @@
     path: /lib/systemd/system/mariadb.service
   register: mariadb_unit_file
 
-- name: Copy pkg's /lib/systemd/system/mariadb.service to /etc/systemd/system/ to be customized (CREATES TIMETAMPED BACKUPS OF /etc/systemd/system/mariadb.service e.g. IF OPERATOR CUSTOMIZED IT, EVEN DESPITE WARNING BELOW!)
+- name: Copy pkg's /lib/systemd/system/mariadb.service to /etc/systemd/system/ to be customized (CREATES TIMESTAMPED BACKUPS OF /etc/systemd/system/mariadb.service e.g. IF OPERATOR CUSTOMIZED IT, EVEN DESPITE WARNING BELOW!)
   copy:
     force: yes
     backup: yes