I have 2 FON La Fonera and 2 other Accton boxes all with Atheros AR2315 chipsets and I am experiencing very weird issues on all of them.
With a vanilla openwrt (tried 7.09 and bleeding edge svn from last night), only sometimes (intermittent issue) my Macbook Pro and another Dell laptop can connect to the AP, but get disconnected/reconnected/disconnected/reconnected every ~ 3-4 seconds.
Not long enough to be totally disassociated, so on the macbook pro I can keep surfing and it's just "very slow". On XP it eventually switches to another router if I have reachable nodes set to "Automatically" join.
When it happens, I do "wlanconfig ath0 list" to see who's associated, and I see the laptop getting connected/disconnected all the time. Nothing in the logs.
Playing with different settings with iwpriv (or setting the rate to something else) seems to help stabilize things for a couple of minutes, but it fails again later.
The same laptops have no problems connecting to WRT54G's with the same firmware.
Has anybody experienced this issue?