I found an old topic that describes the issue:
http://www.tinyportal.net/index.php?action=bugtracker;sa=bug498
The topic is "closed" but I can confirm that the bug is still there in TP 1.0 beta 5-1. Btw the solution suggested by Bloc
QuoteOpen TPortalBlocks.template and find these lines(there are 3-4 of them):
doesnt work because TPBlocks.template is empty.