~300 bytes length packet encoding problem

[hostap.20.BertrandB at spamgourmet.com]

Hello,

in las ebuild of dhcpcd gentoo pad short packets to 300 bytes this cause
problem with wpa_supplicant ? hostap driver ?
I got the message : wifi0: TX - encryption failed and dhcpcd failed
I made tests with different length of packets
300 -> ko
299 -> ko
295 -> ok
305 -> ok
500 -> ok

the orginal bug at gentoo's 
http://bugs.gentoo.org/show_bug.cgi?id=175911

the configuration :
dhcpcd-3.0.17
wpa_supplicant-0.5.7
kernel 2.6.19-gentoo
card info: "IEEE 802.11b", "Wireless LAN PC Card/11M", "PRISM 2.5",
"Rev: C"
driver hostap (from kernel)