[irrtoolset]AS-path filters in RtConfig

Dear all,

Can anybody tell me what has changed in the version 4.8.x (compared to
4.7.x) that such input:

@RtConfig aspath_access_list filter <AS8308$>

ends up in:

Error: badly formed AS_path filter.

It worked in the previous version. I looked into RFC2622, and there is an
example of the filter: <AS2$>
Does it need any quotation or something?
Did anybody have this problem?

Thanks

--PE