Other solution could be this (worked for me):
1) Remove the following folder:
/home/user/.gconf/apps/panel
2) Logoff.
3) Login back.
Type: Posts; User: t6ti00; Keyword(s):
Other solution could be this (worked for me):
1) Remove the following folder:
/home/user/.gconf/apps/panel
2) Logoff.
3) Login back.
Right now
total used free shared buffers cached
Mem: 3023 607 2415 0 55 254
-/+ buffers/cache: 296 2726...