user12049: Here's an output of listtransactions method 
[
{
"account" : "",
"address" : "mz2A28GQxWrYgMn2z9pRqaUFNqTMyhk1sJ",
"category" : "receive",
"amount" : 6.30000000,
"confirmations" : 157,
"blockhash" : "00000000befa3ef184f6c3cdec8814b945bad9e3f7ce9eb38e3102bcf4c030c0",
"blockindex" : 9,
"blocktime" : 1397675516,
"txid" : "f517350f088d235878ecab8d5241f0b6e59a4081eec22031c449d0d01d79ed66",
"walletconflicts" : [
],
"time" : 1397672026,
"timereceived" : 1397672026
}
]

what's walletconflicts, it's array of what ? transaction ids, maybe ? i couldn't find any documentation even in Bitcoin console.

user9563: This is new. It is a field, which contains txids which hold the same data as the original transaction (but has different txids).
See ID-malleation bug

12049: <p>Here's an output of listtransactions method </p>

<pre><code>[
{
"account" : "",
"address" : "mz2A28GQxWrYgMn2z9pRqaUFNqTMyhk1sJ",
"category" : "receive",
"amount" : 6.30000000,
"confirmations" : 157,
"blockhash" : "00000000befa3ef184f6c3cdec8814b945bad9e3f7ce9eb38e3102bcf4c030c0",
"blockindex" : 9,
"blocktime" : 1397675516,
"txid" : "f517350f088d235878ecab8d5241f0b6e59a4081eec22031c449d0d01d79ed66",
"walletconflicts" : [
],
"time" : 1397672026,
"timereceived" : 1397672026
}
]
</code></pre>

<p>what's walletconflicts, it's array of what ? transaction ids, maybe ? i couldn't find any documentation even in Bitcoin console.</p>
 9563: <p>This is new. It is a field, which contains txids which hold the same data as the original transaction (but has different txids).</p>

<p>See <a href="http://www.cryptocoinsnews.com/news/bitcoin-transaction-malleability/2014/02/16" rel="nofollow">ID-malleation bug</a></p>
