This is rather strange. It's all I get on all my machines now (I am testing the settings with my desktop machine for convenience):
19:45:46:001 1978 args: -tt 0 -mport 0
19:45:46:006 1978
19:45:46:010 1978 ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
19:45:46:015 1978 ş Claymore's ZCash AMD GPU Miner v1.1 Beta ş
19:45:46:019 1978 ČÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍĽ
19:45:46:024 1978
19:45:46:230 1978 ZEC: 1 pool is specified
19:45:46:236 1978 Main ZCash pool is equihash.eu.nicehash.com:3357
19:45:46:520 1978 OpenCL platform: AMD Accelerated Parallel Processing
19:45:46:524 1978 OpenCL initializing...
19:45:46:526 1978 AMD Cards available: 1
19:45:46:529 1978 GPU #0: Hawaii, 4096 MB available, 44 compute units
19:45:46:532 1978 GPU #0 recognized as Radeon 290X
19:45:46:535 1978 POOL version
19:45:46:537 1978 b107
19:45:46:540 1978 Platform: Windows
19:45:46:548 1978 start building OpenCL program...
19:45:46:555 1978 done
19:45:46:558 1978 Total cards: 1
19:45:56:329 29c8 ZEC: Stratum - connecting to 'equihash.eu.nicehash.com' <5.153.50.217> port 3357
19:45:56:387 29c8 send: {"id": 1, "method": "mining.subscribe", "params": ["equihashminer", null, "equihash.eu.nicehash.com", "3357"]}
19:45:56:390 29c8 send: {"id": 2, "method": "mining.authorize", "params": ["1ExV8BCzSYoxy77v7A4p1ziAKAn9mLnFC.desktop","x"]}
19:45:56:393 29c8 send: {"id": 5, "method": "mining.extranonce.subscribe", "params": []}
19:45:56:397 29c8 ZEC: Stratum - Connected (equihash.eu.nicehash.com:3357)
19:45:56:419 1978 Watchdog enabled
19:45:56:422 1978
19:45:59:484 29c8 checkread timeout
19:46:02:590 29c8 checkread timeout
19:46:05:690 29c8 checkread timeout
19:46:08:781 29c8 checkread timeout
19:46:11:877 29c8 checkread timeout
19:46:14:937 29c8 checkread timeout
19:46:18:020 29c8 checkread timeout
19:46:21:094 29c8 checkread timeout
19:46:24:178 29c8 checkread timeout
19:46:26:428 1978 em hbt: 30110, fm hbt: 47,
19:46:26:433 1978 watchdog - thread 0, hb time 63
19:46:26:438 1978 watchdog - thread 1, hb time 63
19:46:27:273 29c8 checkread timeout
19:46:27:279 29c8 ZEC: Job timeout, disconnect, retry in 20 sec...
19:46:47:285 29c8 ZEC: Stratum - connecting to 'equihash.eu.nicehash.com' <5.153.50.217> port 3357
19:46:47:342 29c8 send: {"id": 1, "method": "mining.subscribe", "params": ["equihashminer", null, "equihash.eu.nicehash.com", "3357"]}
19:46:47:348 29c8 send: {"id": 2, "method": "mining.authorize", "params": ["1ExV8BCzSYoxy77v7A4p1ziAKAn9mLnFC.desktop","x"]}
19:46:47:353 29c8 send: {"id": 5, "method": "mining.extranonce.subscribe", "params": []}
19:46:47:358 29c8 ZEC: Stratum - Connected (equihash.eu.nicehash.com:3357)
19:46:50:425 29c8 checkread timeout
19:46:53:496 29c8 checkread timeout
19:46:56:445 1978 em hbt: 9156, fm hbt: 15,
19:46:56:449 1978 watchdog - thread 0, hb time 31
19:46:56:452 1978 watchdog - thread 1, hb time 46
19:46:56:570 29c8 checkread timeout
19:46:59:651 29c8 checkread timeout
19:47:02:727 29c8 checkread timeout
19:47:05:850 29c8 checkread timeout
19:47:08:923 29c8 checkread timeout
19:47:11:991 29c8 checkread timeout
19:47:15:059 29c8 checkread timeout
19:47:18:130 29c8 checkread timeout
19:47:18:136 29c8 ZEC: Job timeout, disconnect, retry in 20 sec...
19:47:26:457 1978 em hbt: 39172, fm hbt: 78,
19:47:26:463 1978 watchdog - thread 0, hb time 16
19:47:26:468 1978 watchdog - thread 1, hb time 47
19:47:38:143 29c8 ZEC: Stratum - connecting to 'equihash.eu.nicehash.com' <5.153.50.217> port 3357
19:47:38:194 29c8 send: {"id": 1, "method": "mining.subscribe", "params": ["equihashminer", null, "equihash.eu.nicehash.com", "3357"]}
19:47:38:197 29c8 send: {"id": 2, "method": "mining.authorize", "params": ["1ExV8BCzSYoxy77v7A4p1ziAKAn9mLnFC.desktop","x"]}
19:47:38:200 29c8 send: {"id": 5, "method": "mining.extranonce.subscribe", "params": []}
19:47:38:203 29c8 ZEC: Stratum - Connected (equihash.eu.nicehash.com:3357)
19:47:41:285 29c8 checkread timeout
19:47:44:362 29c8 checkread timeout
This started when upgraded to v1.1 but going back to v1.0 does not seem to solve it.
I can ping the address fine from all the local machines and I see active buy orders on nicehash for equihash.