Is this a security issue in ETH? Hack?? Plz help

[google98]

Hey,

I just opened mist and noticed some attempted transactions which could not be processed.

Apparently somebody tried to steal some DAOs, the ID is: 0x0A869d79a7052C7f1b55a8EbAbbEa3420F0D1E13 and 0x8B3B3b624c3c0397D3da8Fd861512393d51DCbac.

The recipient's ID is The DAO (0xBB9bc244D798123fDe783fCc1C72d3Bb8C189413).

Fortunately the tx didn't go through but I'm worried somehow - is this a hacking attempt? The first mentioned account has created thousands of contracts according to the etherscan.io, however, I can't read anything off the code - can anyone help here please?

Everything startet May 28 ("DAO-Toke exchange", 2 attempts) and continued today (3 attempts)

Thanks a lot!