yeah i've been experiencing it when i try to swim in the lake outside Riften its quite annoying considering there is a side quest on the riften docks that i want to get.
anyway im not sure our voices will be heard considering how little Bethesda seems to care for play station users im amazed we got as many patches to "fix" the game as it was. anyway im not sure its the game it could be but it could also be a number of design flaws with the ps3 that it cant handle certain things. personally i think im going to trade my copy in for the Xbox equivalent
Edit: evidently this glitch with the water is apparently a common issue the fix i have found and am currently trying is deleting the skyrim data (not save files) from my ps3 and reinstalling and seeing if that works. it works for some people apparently.
http://trendygamers.com/2012/04/05/problems-ps3-skyrim-1-05-patch-arise/ Source of fix