Question:

Google Maps don't display in the Places view. What is wrong?

We only encoumtered this on Windows, butit is also possible on the Mac.

MyBlood uses the embedded browser functionality of the Operating System you use. On Windows this is IE (internet explorer), on Mac this is WebKit (what Safari uses). If there is a change in the configuration of the browser, this can impact the fact if you can see items in MyBlood. In most cases this is malware that blocks the page to be loaded.
You'll have to configure your browser to accept pages from Google, or remove cookes or other items that block the Google pages.
On PC you can use SpyBot search & destroy to remove all kinds of malware.
A lot of anti-virus-software programs also have malware detection possibilities.