we've just check Linux install package, it seems to be OK. I'd recommend you download it again.
There is comment from our engineer
Ive completed double check of downloading and unpacking 2572515057 338277211 l_ipp_ia32_p_5.3.4.080.tgz
CheckSum is OK
The root problem is huge file /l_ipp_ia32_p_5.3.4.080/install/install
(It takes about 3 minutes to unpack this file on quad core system)
But actually everything unpacks successfully and Ill be able to install and use IPP