Kernel 1800 scrolling unusable

[Partha Bagchi <partha partha com>]

Just installed Kernel version 1800. Firefox and Thunderbird are now 
completely unusable since the CPU jumps to 100% usage as soon as you 
start scrolling (Synaptic Touchpad). Same issue with scrolling in a 
terminal.

Also started getting these errors:

Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_info_register
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol 
snd_info_create_module_entry
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_info_free_entry
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_iprintf
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_ecards_limit
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol 
snd_oss_info_register
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol 
snd_unregister_device
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_device_new
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_info_unregister
Dec 30 09:10:37 Rodin kernel: snd_timer: Unknown symbol snd_register_device
Dec 30 09:10:37 Rodin kernel: snd_pcm_oss: Unknown symbol 
snd_mixer_oss_ioctl_card

These errors are not present in the 1788 kernel.

Thanks,
Partha