We suspect the wireless network may be giving us problems - but can't pinpoiint it. Right now (which prompted this message) I can see her machine (on wireless) but not mine (cabled). That's actually not bad because I don't have a need to connect to mine via the netwoirk - so works well . But often it's the other way around - or we can't see either machine. And the problem does seem to occur when we're both in our offices.
Our networking is very simple - we use it as work rather than home - but if anyone have any idea what might be causing this I'd appreciate it.