All white leaf is just due to lack of photosynthesis as Xavier suggested. There is no reason to get upset with the plant, particularly, if it has been stored in a low light location. Even my TX Star which is in the greenhouse, and the particular area that it was in has a 40 watt MH light beaming on to it all winter, and the first couple of leaves that emerged were very light green, or maybe even white when they just came out. But I didn't notice it the first couple of weeks because I thought that plant had died.
Just took the picture below a few minutes ago. Wish I could have taken one when it just pushed out - it was mostly all light yellow-green, just like the lower part of that third leaf.
I think the light or white leaf buds after a long storage is just from the prolonged low temperatures and lack of light.