User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 ( .NET CLR 3.5.30729) Build Identifier: 3.0.5 I just installed TB 3.0.5 and set up a anumber of EMAIL accounts including one GMAIL account that has at least 5 GB of data in the INBOX alone. TB 3 downloaded all the mail from the GMAIL account. But it keeps doenlaoding the SAME mail over and over again. In other words my INBOX keep growing even if I do not receive any new EMAIL. My GMAIL account has a storage limit of 7 GB. Yet my TB3 INBOX for the GMAIL account is now over 33 GB. I rebuilt the INDEX for the INBOX but that did NOT fix the problem. I turned OFF and ON the SYNC for the GMAIL account but that did not fix the problem. Reproducible: Always Steps to Reproduce: 1. Create a GMAIl account with a INBOX of over 5 GB. 2. Add this GMAIL account to TB 3 3. Watch the size of the INBOX in GMAIL GROW and GROW even when NO new messages arrive. Actual Results: INBOX keeps GROWING and GROWING gobbling up disk space even hen NO new messages arrive. GMAIL has a storage limit of 7 GB yet the size of my INBOX in TB is now over 32 GB. Expected Results: Size of INBOX remains the same and ONLY grows when new messages arrive.

what's the best references about gmail issues like this? http://getsatisfaction.com/mozilla_messaging/topics/my_gmail_account_exceeded_bandwidth_limits has some

Thanks for the link. And yes, this bug will also create the "Bandwidth exceeded" problem and TB 3 will be unable to download any new Mail until your GMAIL account gets reset 24 hours later. After doing some research, it looks like the problem stems from the fact that the maximum size of a mbox file is 4 GB. Until that limit gets changed, I recommend that TB3 check the size of EACH folder (including the INBOX) on a GMAIL account WHEN adding a new GMAIL account to TB3. If the size of ANY folder (e.g. INBOX etc) is greater than 4 GB, then TB3 should refuse adding the GMAIL account and provide a message to the end user recommending that messages be moved using the web interface until EACH folder in the GMAIL account is less than 4 GB.

3.1 has removed the limit, which makes this a dup.