No idea but are you using poclbm or other miner?
BTW. Why did slush go down just now?
EDIT: ok, it is up running again.
It's using poclbm, and is the Feb update to Guiminer.
edit: my poclbm.ini file is
{
"profiles": [
{
"username": "XXXXX",
"balance_auth_token": "",
"name": "Default",
"hostname": "pool57wkuu5yuhzb.onion",
"external_path": "",
"affinity_mask": 1,
"flags": "",
"autostart": false,
"device": 0,
"password": "XXXX",
"port": "8332"
}
],
"bitcoin_executable": "C:\\Program Files\\Bitcoin\\bitcoin.exe",
"show_console": false,
"show_summary": true,
"show_opencl_warning": true,
"console_max_lines": 5000,
"start_minimized": false,
"window_position": [
882,
567,
845,
256
]
}