Recently, this error message has been appearing frequently necessitating a log off then log in again. What could be the root cause of it? (I apologize for specific reference to my database)

serendipity error: could not include /services/webpages/a/i/aisgrade7.net/public/cblog/serendipity_config ...

I have recently been receiving the following error message frequently:

serendipity error: could not include /services/webpages/a/i/aisgrade6.net/public/cblog/serendipity_config_local.inc.php - exiting.
Please create the file yourself or check permissions

Any suggestions?

I solved the problem with the odd characters with your suggestion referring to "use database charsets."

Arabic is still not functioning in version Serendipity 1.5.4 and PHP 5.2.13, however it works just fine in Powered by Serendipity 1.2 and PHP 5.2.13 which runs 2 of the 3 blogs. I use English as ...

When posting, odd characters are appearing after saving, like:
"?��" for a dash or an apostrophe.

I am also not able to post in Arabic without the same character problems happening.

On two of the blogs which were an earlier version of Serendipity, this is not a problem, but in the one that is the ...