Probably it is related to some timing issues during bootup. For example, I frequently have Nautilus to fail to load at bootup with autologin (but not always), see the bug https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/241807 , when typing the password manually it always loads, and also pptp connection if configured to run in the startup scripts, works only if to insert a long pause before the command, or start in step-by-step mode (in earlier distributions all worked well without any pause).
Probably it is related to some timing issues during bootup. For example, I frequently have Nautilus to fail to load at bootup with autologin (but not always), see the bug https:/ /bugs.launchpad .net/ubuntu/ +source/ nautilus/ +bug/241807 , when typing the password manually it always loads, and also pptp connection if configured to run in the startup scripts, works only if to insert a long pause before the command, or start in step-by-step mode (in earlier distributions all worked well without any pause).