I have a Flanders Red I brewer about 6 years ago. I have a few bottles left and it is still quite tasty. I open a bottle last night that had two little white lumps on top but more oddly it had an oily sheen instead of a head. Still had a nice gentle carbonation. I used the Roeselare Ale Blend and a pretty straight forward grain bill. Are there some critters that cause that?
Wyeast website said Roeselare contains: a sherry strain, two Brettanomyces strains, a Lactobacillus culture, and a Pediococcus culture. I could see the sherry strain causing the white bits that floated on top?
My candle burns at both ends; it will not last the night; but ah, my foes and oh, my friends it gives a lovely light. Edna st. Vincent