Error after upgrading to 1.4

When trying to get monthly stats (any report) I am getting this

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 4104 bytes) in /usr/sites/maidan/www/piwik/core/DataTable.php on line 969

I only upgraded piwik from verion 1.2. to 1.4. Nothing on server was changed

Thank you
NZ

Same problem after Update from 1.3 > 1.4 !!!

Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 177959532 bytes) in /srv/www/vhosts/xyz/httpdocs/piwik/plugins/SiteSearch/ExtendedDataTableRow.php on line 35

1073741824 bytes = 1 Gigabyte!

Greetings,
Joe

[size=small]PS: my Piwik-DB has only 342,3 MB[/size]

[size=large]Problem solved:[/size]

had to delete
piwik.piwik_archive_blob_2011_04+
and
piwik.piwik_archive_numeric_2011_04
and let Piwik rebuild them.
Afterwards monthly stats worked again.

Greetings,
Joe