I encountered a problem on the Mac - both PPC and Intel - that GS tech support confirmed is a known bug (54333) and I thought I'd post it here with the current workaround.
Observed behavior: no graphics show up in the interactive schedule window for schedules or indexes - neither the linework around the table cells, nor the preview images of library parts in legend-type schedules. Only text (which is the correct text at least).
The correct information is placed on layouts, though.
Things look perfect on XP.
If you see the problem while working on your schedules, simply turn true line weight off and the linework will appear.
Karl
