Adsense incompatible with Blogger?

When I tried to insert 'Google SiteSearch' code generated through Google Adsense into the template of my Blog on the recently revamped Google's Blogger - it gave the following error on saving:

Your template could not be parsed as it is not well-formed. Please make sure all XML elements are closed properly. XML error message: Attribute name "checked" associated with an element type "input" must be followed by the ' = ' character.

Since, the new Blogger had been in beta earlier - I suppose these quirks have already been discussed and thus, I got the solution i.e. to write: checked = "true" to get rid of the problem in the SiteSearch's auto-generated code. But, the bigger question is "Is the adsense generating non-standard code?"