We've gotten a few reports of a crash in the web player which gives the following message: "Fatal error in gc Too many heap sections." That's all I know other than the crashes were on Windows (XP I think) in IE, and cannot be consistently reproduced. One user said they needed to restart their machine. Could this be a memory problem? This particular program is a simulation that can generate very large arrays of data. The larger the arrays, the more likely getting this error. But only occasionally.