Colours and dots

Listview (coloured lines)
Cache is searchable
Cache has been archived
Caches owned by Yourself
Caches found by Yourself

Dots in front of waypointnames
Cache is new due to GPX-import
Update in description of the cache
New logentries

Other Symbols
TravelBug
DNF-Indicator (as You can see more colours, the more DNF's are logged)
Data record incomplete