Update: it appears that the bug may be due to some kind of 'race condition' between processes during boot.
After a later boot the icons 'popped back' to their 'proper' positions (twice). They, apparently, hadn't lost any position information in the interim, but have since returned to being drawn shifted upwards.
Update: it appears that the bug may be due to some kind of 'race condition' between processes during boot.
After a later boot the icons 'popped back' to their 'proper' positions (twice). They, apparently, hadn't lost any position information in the interim, but have since returned to being drawn shifted upwards.
James