Thanks for the clearance. Site doesn’t return 404 pages until now. I’ll keep checking this till next week. So hopefully it stays this way.
About the rewrite rules. I don’t think rules are flushed on every page load. But I’ve have seen this option in All for one SEO pack plugin: Force Rewrites. This option uses output-buffering to be sure that a title-tag gets rewritten. Not sure if this is the evil-doer. Don’t think so, but I switched this option off just in case.
Is there a way to screen/check if rules are being flushed on frontend? I believe there is no other plugin that flushes rules except sublanguage and the SEO plugins.
Thanks for your quick response Maxime. I’ve installed the development version. I will check at the end of the day and tomorrow if the problem still occurs. I’ll let you know.
Is it possible to explain the issue? So we can understand it?
And will v2.7 be public soon? We didn’t encounter this on any other site where we use the sublanguage plugin. But if we do, we can update the plugin.
Thanks!