Vimeo Choppy playing full screen sometime small window

[DLX]

Vimeo Choppy playing full screen sometime small window. I don't remember having this when first loaded LL  :-\
but do now. I have turned off HD when playing  to speed up.

Don't have any problem play full screen youtube videos. maybe as HTML5 player

There could be something else going on as I type a work the le t t er takes time to aper on screen!
LLCC - says up to date.

Fix some how or fresh install ?
Thanks

here are my stats of computer.

Code:

description: CPU
       product: Intel(R) Atom(TM) CPU D525   @ 1.80GHz
       vendor: Intel Corp.
       physical id: 4
       bus info: cpu@0
       version: Intel(R) Atom(TM) CPU D525   @ 1.80GHz
       serial: To Be Filled By O.E.M.
       slot: CPU 1
       size: 1800MHz
       capacity: 1900MHz
       width: 64 bits
       clock: 200MHz
       capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm
       configuration: cores=2 enabledcores=2 threads=4

*-display               
       description: VGA compatible controller
       product: GT218 [ION]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a2
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nouveau latency=0
       resources: irq:45 memory:fd000000-fdffffff memory:d0000000-dfffffff memory:ce000000-cfffffff ioport:dc00(size=128) memory:fcf80000-fcffffff


free -h
#             total       used       free     shared    buffers     cached
Mem:          3.9G       1.3G       2.6G        20M        40M       471M
-/+ buffers/cache:       821M       3.1G
Swap:         4.0G         0B       4.0G