I'm running fedora core 4 since this is a sound issue my sound card is an intergrated ac'97 chip

I get this error when running StarCraft Broodwar now. It's new to me, it dosn't crash and everything works fine but errors bother me

I get it many times with the number after len= being different everytime
Sometimes i do not get it al all

err:dsound:DSOUND_PhaseCancel length not a multiple of block size, len=11 698, block size=4

what is/is there a problem?
How might i fix it