The issue seems to be gcc 4.4 creating insufficient debug information for the allocator template argument of std::map<Key, Value, Comp, Alloc>.

Unfortunately, the code displaying the std::map relies on that.
It looks like you have two options:
(a) Use 4.5 or later.
(b) Replace the use of the Allocator with something that has the same effect: Find the file share/qtcreator/gdbmacros/gdbmacros.py in your Creator installation. There should be a function 'qdump__std__map' around line 1800. In this function, replace the line 'pairType = templateArgument(templateArgument(item.value.type, 3), 0)' by 'pairType = templateArgument(impl.type, 1)'