The OpenBiblio v. 5.2 works perfectly, but since I 've updated to v. 6 the tabs on top of the page arn't showing anymore, so page navigation is impossible. Has anyone encountered the same problem? Could it be php 5.3 from my webhost?
v0.6 works fine here with PHP 5.3 after dealing with the 'deprecation' issue. But I never lost the tabs as you report.
I suggest reposting your question in the 'Help' forum as more users are liable to see your query there and respond. This forum is intended for those working on newer releases beyond 0.6.