white particle floating in fermentation bottle?

[shawn]

My fermenting beer after one week, appear many particle floating in the beer, not equal size, floating around. I did open the cap few times before that, is that contaminated? My last few brew didn't have such strange thing happen, I open and smell but it smell very nice. Still can drink?

here is the picture:

 

[Ally_sives]

Could just be the yeast sinking to the bottom. I just had a problem and it could well be the same thing.