problem with widget titles

Hi there,
I’ve noticed that the background area of the widget titles are not displaying correctly. I’m not sure what’s happening as I haven’t changed the code for them. The background is now pushed up against the text on the right hand side and if the text is too long the title breaks into two lines with a break in the center.

See the bottom right of the following page to see the title with the line split; here

I tried playing about with the right margin and padding but it didn’t go back to normal (the longer titles were still splitting in the middle. I’m not sure what it is that has caused the change -as it was looking fine a couple of days ago.

Any help would be really appreciated.
Thank you.

Jenny