SparkCoin withdrawals have been enabled again following a community takeover of SPARK and resolution of its forked blockchain. I reset pending cashout requests and set everyone's automatic withdrawal threshold to 100,000 SPARK to prevent unintentional automatic withdrawals going to an old/forked wallet. I've also cleared everyone's saved withdrawal address, just to make sure you don't withdraw to an old address by mistake.
Please confirm that wherever you are withdrawing to is on the correct blockchain! Bittrex is still working on it so it is disabled there, and Bter has enabled trading but is not taking deposits for it last I heard.
For anyone with some SPARK I've managed to release a Windows version of the fixed wallet now, you can download it from Github at
https://github.com/RentaMouse/Spark/releases/tag/v1.2.0IPOminer can confirm but I believe the pool was on the "correct" fork all along so no miners should have lost out, it seems that some of the exchanges and maybe one pool who joined after launch received a different version of the wallet to the launch release and that contributed to the network fork.