i see the following in dmesg output after booting the device:
-------------------snip------------------
[ 5.398071] isp_mod: Unknown symbol iommu_restore_ctx
[ 5.398529] isp_mod: Unknown symbol iommu_vfree
[ 5.399230] isp_mod: Unknown symbol iommu_put
[ 5.446807] isp_mod: Unknown symbol iommu_save_ctx
[ 5.447570] isp_mod: Unknown symbol iommu_vunmap
[ 5.448150] isp_mod: Unknown symbol iommu_vmalloc
[ 5.449432] isp_mod: Unknown symbol iommu_get
[ 5.450042] isp_mod: Unknown symbol iommu_kmap
[ 5.450531] isp_mod: Unknown symbol da_to_va
[ 5.451110] isp_mod: Unknown symbol iommu_vmap
[ 5.451446] isp_mod: Unknown symbol iommu_kunmap
[ 5.451843] isp_mod: Unknown symbol videobuf_to_dma
[ 5.587829] isp_mod: disagrees about version of symbol struct_module
---------------------snip---------------------

i do not know if this was already present in pr1.2 or what effects it might have, just stumbed across it while looking for sth. else.

Also up to now I have not yet encountered any problem with pr1.3, so maybe it can be neglected. If I see some effect from it I'll file a bug for it.

btw. i did an ota update and had the nokia default kernel installed.