As also visible on the Introductionary page http://plantuml.sourceforge.net/component.html for Component diagrams, the components overlap with the labels of "Database" containers and are very tight below the label of a "Node" container. As a work around adding line feeds into the label works, but its not perfect.
Example which exhibits the rendering issue (using Graphvix 2.38)
' contents database overlaps with label
database "MySql" {
folder "This is my folder" {
[Item 1]
}
frame "Foo" {
[Item 2]
}
}
database "Oracle" {
[Item 3]
}
' even for 'nodes' the contents are very close the title
node "Node" {
[Item 4]
}
