These problems are most likely to be fixed if each has its own bug report with precise steps to reproduce. For example, the steps for (1a) might be something like this:
1. On one workspace, launch Firefox
2. On another workspace, launch Gimp
3. Focus Gimp's document window
4. Click Firefox's launcher item
5. Click Gimp's launcher item
These problems are most likely to be fixed if each has its own bug report with precise steps to reproduce. For example, the steps for (1a) might be something like this:
1. On one workspace, launch Firefox
2. On another workspace, launch Gimp
3. Focus Gimp's document window
4. Click Firefox's launcher item
5. Click Gimp's launcher item
Bug 646029 may also be related.
(1b) is a duplicate of bug 687429.