You see this behaviour because when you switch projects the filter gets reset. The reason is that the users, etc. that you have selected may not apply to the new project.

I agree that this is less than ideal. Not sure what the best solution is... maybe we just clear the appropriate fields of the filter...

I think we just need to handle Hide Resolved the same way we handle Hide Closed.

This is now fixed in CVS. Any filters that make sense and are valid to keep are not reset (this means, for example, that the Reporter filter is not kept).