I can confirm this bug. My wireless card is a AR2413 802.11bg NIC (rev 01) and I'm using Ubuntu 9.04 with vanilla kernel 2.6.32.2.
When activating the card and loading the ath5k-module, dmesg says: ath5k 0000:06:02.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 ath5k 0000:06:02.0: registered as 'phy0' ath5k phy0: Invalid EEPROM checksum 0xb0e2 ath5k phy0: unable to init EEPROM ath5k 0000:06:02.0: PCI INT A disabled ath5k: probe of 0000:06:02.0 failed with error -5 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
