A chart in Numbers causing crashes

A chart in Numbers is causing Numbers to slow down & stutter when it is seleced or edited. The memory is eventually depleted and Numbers crashes. I'm using Numbers 2008 1.0.3. This chart is pulling info from formulas in a large table. That table is pulling infor from several smaller charts. This is odd to me and it is the first time I have had this problem. I have restart Numbers & the MBP. In both cases, the memnory is returned the same & I restart. The file is fine for a good while unless I start messing with that chart. Then, the free memory excellerates it's disappearing act & Numbers crashes. I will pay closer attention to the wired, active, & inactive. I use iStat to follow this stuff. What could be causing the memory disappearing act & the crashing? It's just a chart. I did see other posting about memory loss for Numbers 2009, but nothing within a year or that really addressed my issue.