Yea you are right, this happened before, I am thinking the computer into sleep mode, I turned that off AGAIN, and will watch the data. The hard drive issue is bewildering, I often come into my office and hear the HD running for long periods, when I shut down WCat, it stops. Did a disk utility a couple times since to no avail. Here's dump form my console, I'll keep an eye on this. Can you look at WCat logs older than 24 hours?
5/21/13 3:17:20.687 PM WeatherCat[22938]: ***Hardware comms fail (stale data)***
5/21/13 3:17:22.021 PM WeatherCat[22938]: ***Hardware comms restored***
5/21/13 3:17:24.959 PM WeatherCat[22938]: DM: Want 109 historical minutes.
5/21/13 3:17:26.064 PM WeatherCat[22938]: DM 0: Initialising sample cache
5/21/13 3:17:27.297 PM WeatherCat[22938]: DM 0: Sample cache initialised. Took 1.23 seconds
5/21/13 3:17:27.297 PM WeatherCat[22938]: Loading current month...
5/21/13 4:23:45.902 PM WeatherCat[22938]: ***Hardware comms fail (stale data)***
5/21/13 4:23:47.111 PM WeatherCat[22938]: ***Hardware comms restored***
5/21/13 4:23:51.053 PM WeatherCat[22938]: Loading current month...
5/21/13 4:23:52.604 PM WeatherCat[22938]: DM: Want 66 historical minutes.
5/21/13 4:23:53.449 PM WeatherCat[22938]: DM 0: Initialising sample cache
5/21/13 4:23:53.483 PM WeatherCat[22938]: DM 0: Sample cache initialised. Took 0.03 seconds
5/21/13 4:23:53.483 PM WeatherCat[22938]: Loading current month...
5/21/13 4:24:29.055 PM WeatherCat[22938]: Loading current month...
5/21/13 5:11:12.344 PM WeatherCat[419]: Checking System Version is 10.5 or later...
5/21/13 5:11:12.345 PM WeatherCat[419]: System Version Check OK, running...
5/21/13 5:11:12.388 PM WeatherCat[419]: Main Controller initialised.
5/21/13 5:11:12.389 PM WeatherCat[419]: WeatherCat is Running...
5/21/13 5:11:12.391 PM WeatherCat[419]: NSPanel does not support NSUnifiedTitleAndToolbarWindowMask in a utility window
5/21/13 5:11:13.958 PM WeatherCat[419]: DM 0: ***Hello!***
5/21/13 5:11:13.960 PM WeatherCat[419]: DM 0: Initialising sample cache
5/21/13 5:11:14.010 PM WeatherCat[419]: DM 0: Sample cache initialised. Took 0.05 seconds
5/21/13 5:11:14.011 PM WeatherCat[419]: Loading current month...
5/21/13 5:11:26.871 PM WeatherCat[419]: StatsInit took 9.584342 seconds to process
5/21/13 5:11:26.996 PM WeatherCat[419]: Stats(0) took 0.121904 seconds to parse
5/21/13 5:11:27.383 PM WeatherCat[419]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCat.app/Contents/Resources//IntegratedPlugins/CurrentConditionsCalculator.bundle.
5/21/13 5:11:27.385 PM WeatherCat[419]: WeatherCatPlugInManager: Loaded Current Conditions Calculator.
5/21/13 5:11:27.387 PM WeatherCat[419]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCat.app/Contents/Resources//IntegratedPlugins/WCStatus.bundle.
5/21/13 5:11:27.395 PM WeatherCat[419]: WeatherCatPlugInManager: Loaded Live Data View.
5/21/13 5:11:27.398 PM WeatherCat[419]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCatPlugIns/AppPlugIns/BannerGenerator.bundle.
5/21/13 5:11:27.521 PM WeatherCat[419]: WeatherCatPlugInManager: Loaded Banner Generator.
5/21/13 5:11:29.785 PM WeatherCat[419]: Vantage rain collector is set to 0.01 inch
5/21/13 5:11:37.212 PM WeatherCat[419]: Trying to bind to network port
5/21/13 5:11:37.212 PM WeatherCat[419]: Got network port
5/21/13 5:11:37.243 PM WeatherCat[419]: getFTPPassword failed with code -25300
5/21/13 5:11:37.266 PM WeatherCat[419]: CustomWebGetFTPPassword failed with code -25300
5/21/13 5:11:50.309 PM WeatherCat[419]: Loading current month...
5/21/13 8:39:19.113 PM WeatherCat[1290]: NSPanel does not support NSUnifiedTitleAndToolbarWindowMask in a utility window
5/21/13 8:39:19.154 PM WeatherCat[1290]: Checking System Version is 10.5 or later...
5/21/13 8:39:19.154 PM WeatherCat[1290]: System Version Check OK, running...
5/21/13 8:39:19.199 PM WeatherCat[1290]: Main Controller initialised.
5/21/13 8:39:19.199 PM WeatherCat[1290]: WeatherCat is Running...
5/21/13 8:39:23.733 PM WeatherCat[1290]: DM 0: ***Hello!***
5/21/13 8:39:23.741 PM WeatherCat[1290]: DM 0: Initialising sample cache
5/21/13 8:39:23.888 PM WeatherCat[1290]: DM 0: Sample cache initialised. Took 0.15 seconds
5/21/13 8:39:23.889 PM WeatherCat[1290]: Loading current month...
5/21/13 8:39:34.451 PM WeatherCat[1290]: StatsInit took 7.925650 seconds to process
5/21/13 8:39:34.555 PM WeatherCat[1290]: Stats(0) took 0.101841 seconds to parse
5/21/13 8:39:35.151 PM WeatherCat[1290]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCat.app/Contents/Resources//IntegratedPlugins/CurrentConditionsCalculator.bundle.
5/21/13 8:39:35.153 PM WeatherCat[1290]: WeatherCatPlugInManager: Loaded Current Conditions Calculator.
5/21/13 8:39:35.157 PM WeatherCat[1290]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCat.app/Contents/Resources//IntegratedPlugins/WCStatus.bundle.
5/21/13 8:39:35.162 PM WeatherCat[1290]: WeatherCatPlugInManager: Loaded Live Data View.
5/21/13 8:39:35.174 PM WeatherCat[1290]: WeatherCatPlugInManager: Examining /Applications/WeatherCat/WeatherCatPlugIns/AppPlugIns/BannerGenerator.bundle.
5/21/13 8:39:35.238 PM WeatherCat[1290]: WeatherCatPlugInManager: Loaded Banner Generator.
5/21/13 8:39:37.629 PM WeatherCat[1290]: Vantage rain collector is set to 0.01 inch
5/21/13 8:39:51.251 PM WeatherCat[1290]: Trying to bind to network port
5/21/13 8:39:51.251 PM WeatherCat[1290]: Got network port
5/21/13 8:39:51.281 PM WeatherCat[1290]: getFTPPassword failed with code -25300
5/21/13 8:39:51.306 PM WeatherCat[1290]: CustomWebGetFTPPassword failed with code -25300
5/21/13 8:40:04.420 PM WeatherCat[1290]: Loading current month...