6 - better error handling in src/plugins.c
11 - make it possible to use vlock-all without USE_PLUGINS
12 - do not require key press when no plugin with a vlock_save_abort
14 - exit properly on SIGTERM
15 - use access() instead of uid changes to secure plugin loading
16 - generate error on invalid script
17 - check Script for race conditions
18 - second exception: PluginError -> termination
19 - design: non-recoverable errors print to stderr and abort()
24 - screensavers (aalib, directfb)