If anything 5Ghz P2P links are pretty stable despite being on pure-DFS bands ;)

indeed a bugfix release is out...any insight wrt. the standard font size used compared to 2.1.0? and indeed a LiteBeam clone...

i.e. ~12.5MB/s (100mbps)

off the top of my head..Isn't 802.11a **only** up to 54mbps? (could be mistaken)...

1.6km is not much at all. I can think of several CPE setups over 3km in heavy rural areas (somewhat congested 5GHz band) with no such issues (signal quality, ping times etc). Perhaps a cabling issue...

While we're at it you might as well provide quality stats for your link, i.e. SNR, achieved MCS, b/g/n broadcast mode.