Mark,
Yes the license file is located on a centralized server seperate from those that are failing.
At the risk of sounding like a bad Genesys administrator I had not checked the server times previously, but when I just did there was a mixture of some servers running with times in the range of either 5 minutes earlier or 5 minutes later than the server time on the license manager box and all apps have been up and running for days now since the last problem and have ran for 99.9 % of the time since the original install a year and a half ago, with me not dealing with those server times.
Once I did experience the problem you describe when a server time was incorrectly set from AM to PM and was therefore off by a large chunk of time, but not for these short time frames.
At any rate, thanks for the information, I'll modify the server times at all sites just to be safe....