Copied from post from V2.0.3 patch and still happening in V2.0.4
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When a sea battle starts, the movement is "jerky" - Staccato. Like old black & white movies on hand cranked projectors (no I'm not that old) but it's the best way to explain. Then after 3 or 4 minutes, the movement settles down and becomes smooth.
Tried on all graphics settings LOW to VERY HIGH and effect is the same on all of them.
Running with --
Geforce GS 7900 - 256 MB and 266.58 (latest Driver)
Dual core Intel 6700 - 2.66Ghz Processor
3Gb Memory.

The Original P4 sea battles do not display this problem.
The sea is being rendered differently from P4 original the overlay tile grid is visible.
"Cloud Shadow" is an option on the Graphics TAB but no cloud shadows are displayed if the option is selected.

Also it seems that it isn't time that stops the jerky movement but increasing the game speed to 10x on the main map
and 5x in sea battles, sometimes requires several attempts , but after this speed increase, the movement returns to "normal" - ie. No "hop skipping" but smooth movement.

Anyone else try this and see what the outcome is?