I use gmail almost exclusively and I am very happy with how it works. Recently there surfaced an interesting bug. Attachments can be downloaded individually or combined as a single zip file. It turns out gmail adds a few bytes to the zipped files. After unzipping I see:
C:\Users\erwin\Downloads>dir "AM RFP IFPRI.docx"/s
Directory of C:\Users\erwin\Downloads
12/22/2010 01:03 PM 194,667 AM RFP IFPRI.docx
Directory of C:\Users\erwin\Downloads\rfpburundi
12/24/2010 12:06 PM 195,072 AM RFP IFPRI.docx
Total Files Listed:
First one downloaded as single file, second one unzipped from zip. After a few nasty warning messages about corrupted files Word is actually able to open and view the second file also.