So on ubuntu precise I have spent a ton of time playing with my pulseaudio settings and system.  I have the skips down to about one every ten minutes or so, and humorously while I was typing this sentence.  

I have tsched=0 but in regards to Raymond, my 
default-fragment-size-msec = 4
default-fragments = 8

and my flash videos in chrome play great.   My mind is weak in the morning before coffee, but I remember that chrome was requesting buffers of size on the order of 64 - 100 ms  , somewhere in there.  I might be incorrect, but I believe I needed my pulse settings to be LESS than that.  So 4 * 8 is 32 ms.  Also, you can check ( with  pacmd list-sinks ) that with tsched=1, I noticed that the "current latency" starts at like 2 ms, and as it skips, gets larger, mine would get to around 32 - 64 ms .

in /etc/modules i have
options snd_hda_intel bdl_pos_adj=32 power_save=0 power_save_controller=N model=6stack-dig
but you'll have to figure out your model if you use that param

here is some of my pulse settings for you to try
cat /etc/pulse/daemon.conf  | grep -v -e "^;"  -e "^#" | sed '/^$/d'

allow-module-loading = yes
 allow-exit = yes
 high-priority = yes
 nice-level = -20
 realtime-scheduling = yes
 realtime-priority = 99
 exit-idle-time = 1
 scache-idle-time = 1
 log-target = auto
 log-level = error
 resample-method = speex-float-8
 enable-remixing = yes
flat-volumes = no
 rlimit-nofile = -1
 rlimit-nice = -1
 rlimit-rtprio = -1
 rlimit-rttime = -1
 default-sample-rate = 44100
 default-sample-channels = 2
 default-channel-map = front-left,front-right
 default-fragments = 8
 default-fragment-size-msec = 4

and here is some more output
pacmd list-sinks

* index: 0
	name: <alsa_output.pci-0000_00_1b.0.analog-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
	state: RUNNING
	suspend cause: 
	priority: 9959
	volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	base volume:  93%
	             -2.00 dB
	volume steps: 65537
	muted: no
	current latency: 31.85 ms
	max request: 5 KiB
	max rewind: 5 KiB
	monitor source: 0
	sample spec: s16le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	used by: 1
	linked by: 1
	fixed latency: 31.93 ms
	card: 0 <alsa_card.pci-0000_00_1b.0>
	module: 4
	properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "ALC889 Analog"
		alsa.id = "ALC889 Analog"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "HDA Intel"
		alsa.long_card_name = "HDA Intel at 0xf3120000 irq 50"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1b.0"
		sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.name = "5 Series/3400 Series Chipset High Definition Audio"
		device.form_factor = "internal"
		device.string = "front:0"
		device.buffering.buffer_size = "5632"
		device.buffering.fragment_size = "704"
		device.access_mode = "mmap"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "Built-in Audio Analog Stereo"
		alsa.mixer_name = "Realtek ALC889"
		alsa.components = "HDA:10ec0889,80860032,00100004"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		analog-output: Analog Output (priority 9900, available: unknown)
			properties:
				
	active port: <analog-output>