OK, I resolved the second issue by adding those two rules to my theme css:
.wpbb-topic-buttons > a > img {
display: none;
}
.wpbb-topic-buttons > a:before {
content: "Neues Thema erstellen";
}
I have to add something: why did you use an image for the link “create topic”?? (/wp-content/plugins/wp-bulletin-board/images/dark/create-topic.png)
That way I’ll have to hack the plugin to change the colors!!
