I use Torrent Search with my Ubuntu Linux 10.04 64bit system.
When I use the search function, the memory consumed by the program increases very quickly. Every search increases the memory, and the program does not release ever.
The only workaround is to close Torrent Search and reopen it.
Just to give you an example, when Torrent Search is just started, the memory used is around 22-25 MB. Then I make a couple of searches and the memory is already increased to more than 400 MB.