hi. im a permenent resident and ive been here in the us for 18 years now. my question is..i have lived the 5 years continous residency requirement and planning on travelling outside the us this january 2010. i will be gone for at least 1 month and will file for citizenship application when i come back the following month.. would that complicate the application process.? do i have to be in the us months before i apply? also, if i file now then leave the country for a month (while its in the process), would that be a problem? thanks!