Possibly but I'm skeptical due to the fact that I have read numerous links and posts that sounds like my problem but I will take a peek.
Just a few minutes ago I couldn't SSH from one laptop (wireless) to my desktop computer (wired connection). The reason was that suddenly I couldn't resolve the computer name anymore, IP worked but not the name. As soon as I restarted the network on my laptop I could resolve the name of the desktop computer again..
When it didn't work I checked the network dump on the desktop computer and there was no DNS / NETBIOS requests as I could see.
If I didn't knew better I would think that OpenWrt is messing with me and whenever it feels like it selects one victim and make part of the traffic magically stop..