Failing corks

2004 Joh.Jos.Christoffel Erben, Ürziger Würzgarten Riesling Eiswein;
Failing cork (which seem to me to be a problem on Riesling half bottles. When I moved houses last year, I also moved my wine cellar. Of about a 1000 bottles moved, 10 bottles showed some signs of leakage. Two bottles from Domaine Leroy, both the 2004 vintage, made me worry. Unforgiving at this price- and hierarchy level. Both opened, one had some oxidation, the other was fine. Then two bottles from Peter Nicolay in Mosel, can't quite remember what, but probably Spät.- and/or Auslese from between 2000 and 2007 vintage. The remaining six bottles were all different half-bottles of Riesling, from different producers. Now I've found another two, this being one of them (Six months since I moved the cellar)). Cork soaked, (one dried droplet on the capsule gave it away), heavy mould on the outher side of the cork. Lemon yellow colour, nose of oxidized apples, very ripe orange, towards orange marmalade, Coca-Cola, seems closed. Freshens up more on the palate with air, elegant acidity, playful, elegant, lemony crispness to it, but lacks the nuances of an optimal bottle (I've probably tasted twenty bottles of this one), still manages to deliver quite a marvelous and relatively fresh, if heavier, aftertaste than it should. This is a very rare (and very fine) wine, we can't afford to loose any of them to failing corks. This bottle, about 89.