(UPDATE 7/20/16 12:30 PM EDT: The “Hard Fork” appears to have succeeded; ETH deposits and withdrawals have been re-enabled.)
Beginning at midnight EDT on Tuesday, July 19, 2016 (Wednesday, July 20, 2016 at 04:00 UTC), Gemini will temporarily disable all ether deposits and withdrawals in advance of the forthcoming Ethereum “Hard Fork.” For more details on the technology behind this event, please see the recent blog post from the Ethereum Foundation.
We will resume allowing ether deposits and withdrawals after the “Hard Fork” has been resolved, which is anticipated to be sometime Thursday, July 21 (EDT). Gemini users may still trade ether on our ETH/USD and ETH/BTC matching engines while ether deposits and withdrawals are temporarily disabled.
If you have any questions, please contact Gemini customer support at firstname.lastname@example.org.
Onward and upward!