Strange problem in applet application

Hello Everybody,
I hava an applet whit an image. This image has to changed by color, and text has to be added to the image. The text color is also changable. Here is where it goes wrong.
When I change the background color of the applet, the transparant image will be colored. This is good.
At the start text can be added.
When you change the textcolor, the frame with the JColorChooser will get at the background of the image, like this:
[http://schaftwagen.ncamade.nl/schaftwagenfout.png|http://schaftwagen.ncamade.nl/schaftwagenfout.png] (image)
When you change the text with the "opschrift" button (vertical text) the old text stays under the new text.
When you change the background after this, everything seems to be okay.
At an other forum I've asked this question, and some of that people didn't had this "problem". I am using Windows 7RC with the newest java version. Tested it on an Windows vista and Windows XP all with the same problem.
The source is to big for this forum and can be found at [http://www.dreamincode.net/forums/showtopic117029.htm|http://www.dreamincode.net/forums/showtopic117029.htm]. This is the other forum, where I've asked about his issue. (I hope this link isn't against the rules to post this link to the other forum?)
I hope someone can help me with this problem. The applet can be tested here: [http://schaftwagen.ncamade.nl/colorchooser.asp|http://schaftwagen.ncamade.nl/colorchooser.asp]
Greats,
C.H.F.S.
Edited by: C.H.F.S. on Jul 28, 2009 4:01 AM

I've just tested it on different boxes, and sometimes it does work indeed, but sometimes other problems come up. On one the background color doesn't change but the text color does it right and changing the text work also correctly in that case.
Can anyone help me please solving this strange problem?

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