Aleph look inside your synaptic history, to find out, what was removed...
Here is all the November History:
Commit Log for Fri Nov 16 16:13:53 2012Actualizó los paquetes siguientes:
lxtemp (0.3.1-3leiche2012) to 0.3.1-3pclos2012
Commit Log for Thu Nov 15 16:26:09 2012Actualizó los paquetes siguientes:
liblm_sensors4 (3.3.2-1pclos2012) to 3.3.3-1pclos2012
lm_sensors (3.3.2-1pclos2012) to 3.3.3-1pclos2012
Commit Log for Wed Nov 14 22:45:13 2012Actualizó los paquetes siguientes:
opera (12.02-1pclos2012) to 12.10-1pclos2012
Is it what you search for Aleph?
I am looking for the default cursor, the first cursor when you install PCLOS LXDE or in a live cd, I don't like it but is missing in my system.