PayPal has posted advance notice of the following scheduled maintenance which is expected to cause 3-10 minutes of planned downtime for PayPal APIs at some point between 11-11:15pm PDT on the evening of 08Sept2011. This apparently should NOT affect PayPal Website Payments Standard, but will affect PayPal Website Payments Pro, PayPal for Digital Goods checkout, and PayPal Payflow Pro:
https://www.x.com/community/ppx/system
status/mts_updates/blog/2011/08/11/notification-planned-downtime-during-sep-08-maintenance--pp-live-2226Notification: Planned Downtime During Sep 08 Maintenance - PP-LIVE-2226
Posted by PayPal_Updates on Aug 11, 2011 5:21:04 PM
NOTIFICATION: This maintenance includes a
PLANNED DOWNTIME
lasting 3 minutes to 10 minutes between 11:00 PM PDT (9/9 6:00AM GMT) and 11:15 PM PDT (9/9 6:15AM GMT) when majority of PayPal APIs and WebsitePaymentsPro Payflow edition APIs will be unavailable.
Sent Aug 11, 1:04 PM PDT by MC
Maintenance start time: Sep 08, 11:00 PM PDT (Sep 09, 6:00 AM GMT)
Maintenance end time: Sep 09, 1:00 AM PDT (Sep 09, 8:00 AM GMT)
The following services will be down during this time:
PayPal APIs
WebsitePaymentsPro Payflow edition