I don't know if you managed to fix it yourself, but after dealing with this for so long I figured out how to fix it!
In the following modules: .input_holder #input_big .input_holder #input_small
Add: overflow: auto; word-wrap: break-word
Don't add a ; to that break-word thing. Somehow that fixes it (at least it does with me. Removing word-wrap doesn't have the same effect and adding the ; doesn't work either.)
Re: New Plurk Box doesn't scroll...
In the following modules:
.input_holder #input_big
.input_holder #input_small
Add:
overflow: auto;
word-wrap: break-word
Don't add a ; to that break-word thing. Somehow that fixes it (at least it does with me. Removing word-wrap doesn't have the same effect and adding the ; doesn't work either.)