A couple of days ago we discussed some problems that could arise with sizing files with HFS compression. This problem basically arises from there being a lack of consistency in the various utilities that are available in OS X, where some show compression status and size, and others show the uncompressed size.
HyperCard and HFS Plus problem?
Disk Tools HFS disk
PowerTools 4.1 is okay to use with HFS
"Case-sensitive HFS" and the risks of using it
HDT 2.5 will not support HFS
PlusOptimizer optimizes HFS Plus volumes
Iomega HFS Calculator Trojan Horse?
ShrinkWrap and HFS Plus: A clarification from Aladdin
MacDrive 98 does not support HFS Plus