Search problems after activating fts/solr

Hi,

after activating fts/solr, we can see a changed behavior of standard
(not fulltext) searches. For example, when searching the 'From' field
for something@example.com, before activating solr it was ok to start
search for word 'some' and the result was correct and complete (all
messages from that user was found). After activating fts/solr,
searches like this are returning none or only part of messages - i
need to search for 'something' to get correct and complete result. Any
hints?

azur