File system corruption
FileVault 1 in Snow Leopard and Lion should be fine, provided you:
- maintain file system journaling for both your startup volume and your home directory
- have the .sparsebundle for your home on an internal disk.
If a sparse bundle disk image is on an external disk drive, there may be increased risk of file system corruption that is not resolved by journaling alone.
Forced stops, forced restarts
Pressing and holding the power key to force a stop may be unnecessarily harsh.
If that's your habit when experiencing problems associated with Skype, consider a less harsh alternative — forced restart:
- control⌘⏏ or control⌘power