I installed 2013 since I was having a problem with the properties dialgue in 2012 and solution was to do an install to fix it. So in went 2013.
2013 seems to behave strangely with the hatch command.
Hatching a closed area seems to, occasionally, change the layer and colour of the boundry lines, to those of the hatch being created.
Hatch patterns seem to attach themselves to the boundary lines; beyond normal "associativity". Erasing the hatch pattern now seems to occasionally erase the lines that enclosed the hatched area.
Is this intended behaviour?