I test XOOPS 2.5 RC on my Mac with MAMP.
Until then, no major bug encountered.
By cons, there is a concern,
that already exist. Who I think deserves to be solved "for referencing.
When active the cache on a module.
The title page (no cache)
"I sell a car - my Xoops site"
"Module name - my Xoops site"
All pages of a module with "cache enabled"
are identical. "Module name - my Xoops site"
What is harmful for a good SEO.
And therefore, the use of the cache is obsolete. (To avoid).