Hi Folks,
We're still not certain why this problem suddenly started appearing, but we believe we might have found a workaround.
Please
download LimeWire from this link and see if downloading starts working. Let us know whether or not this version of LimeWire (4.3.3) works for you.
Also please check to see if other things are working properly, like completing a full download, resuming an incomplete download from the library, sharing files, etc...
Thanks for your patience.