I know people have been experiencing unauthorized logins and payout address changes across several pools since yesterday. A pool (pickaxe) from the dgb launch I believe has been pointed to as a possible source but I'm not sure whether there is any evidence to support the claims.  edit: confirmed, read the dgb announcement (first post), it mentions the pool. If you joined that pool be sure to change your password if it was reused on another pool!

I trust feeleep and the coinmine.pl entirely. Change any passwords that are used across multiple pools for safety. But coinmine is not a scam. I've been using a couple of coinmine's pools for awhile now and only have good things to say about them.

Edit: wanted to clarify.. The login attempts and recommendation to change reused passwords extends to all pools for all coins. Not just particle and/or coinmine. It would appear account information has been leaked to an extent so best to be on the safe side if you do reuse your logins and pins.