When trying, they get an error
Do you want to open or save resumable (1.61kb) from www.blogger.com?Right now, it appears that the problem is common to older versions of Internet Explorer.
The blog owners willing to provide details, about their browser, appear to be using Internet Explorer V8 or V9.
It is possible that the owners having a problem with IE V9 are using Blogger with Compatibility View enabled - which effectively gives them IE V8. Noting that Internet Explorer V8 is considerably out of date - and is now not supported by Blogger - it's possible that the primary cause of the problem simply involves use of IE V8 (or V9 with "Compatibility View").
We have a Problem Rollup Discussion, in Blogger Help Forum: Get Help with an Issue, where we are requesting details from everybody who is experiencing this problem.
While we wait for action by Blogger Engineering, everybody experiencing this problem is strongly urged to contribute their details to the Rollup Discussion. Problem diagnosis being as it is, any one person, contributing their details, might contribute the one essential detail that leads to successful diagnosis of the problem.
Alternately, you might consider upgrading Internet Explorer - or disabling "Compatibility View", for "blogger.com".