Response truncated in the presence of special character

When a servlet puts a session attribute containing a collection of strings, one of the strings contains a special character (for example: ...) and this string is displayed in a JSP, the resulting page is truncated before the special character.

For example, in a servlet:

ArrayList optionList = new ArrayList();
...
optionList.add("Any string 1");
optionList.add("Any string 2");
optionList.add("Any string 3");
optionList.add("Any string 4");
optionList.add("A string with ... character");
optionList.add("Any string 6");
optionList.add("Any string 7");
optionList.add("Any string 8");
...
request.getSession(false).setAttribute("myList", optionList);

In the JSP:

<c:forEach var="currentOption" items="${myList}">
${currentOption}
</c:forEach>

The resulting page gets truncated before the 5th line.

In JBoss 4.0.0 the page shows complete, with a ? sign in the place of the special character.