There are small bits in the wine, is that a problem?
Wine is a complex product with thousands of molecues, and over time some can turn solid. We call it sediment. This is normally not a problem at all.
Both red and white wines can throw a sediment after a number of months in bottle. These are tartrate crystals, and are completely harmless. The flavour and aroma of the wine is normally not affected in any way by these.
They occur more frequently with wines that are either unfiltered or only lightly filtered during the manufacturing process, where the aromas and flavours are better preserved.
It is recommended that the bottle is stood upright the day before opening in order that the sediment may settle to the bottom of the bottle, and decanted if desired.