Tonight we have released updates to Joomla Tags and Joomla Knowledgebase with bug fixes and tweaks to make it 100% compatible with Joomla 1.5 (with or without legacy plugin enabled!)
We had been so focused on getting everything working in Joomla 1.5 that we got it almost perfect – until you turned on the legacy plugin then cour component got confused and did not know which version of Joomla it was hosted inside 
So we gave it some more logic and now it doesnt make the same mistake 
Joomla Knowledgebase and Joomla Tags are our only Joomla 1.5 components available.More will follow… more details on those soon…
The latest versions are available for download via your account on myJoomla.com