Suggest Framework and problems with several letter strings

Suggest Framework and problems with several letter strings.
Ensure that some words like Blume, Frivolit?, Horstmar and Occhi are part of your searchkeywords database. There are several others like these . . .
As admin, enable 'Enable Sphider Suggest' and 'Search for suggests in keywords'.
Now search for: blu or fri etc.
After typing the third letter my browser crashes with JavaScript Error.

Is this my personal problem or could this behavior been confirmed by anyone else?

Please do not offer a solution like 'Switch OFF error reporting in your browser', because the problems will remain.

My work around for this bug (?):
Open /include/js_suggest/suggest.php
Incude at row 25

if (ereg('blu',($_GET['q']))) // and all the other letter strings
{
$suggest_phrases = false;
$suggest_keywords = false;
}

To get no suggestion is not a solution, it's just a work around
Any SOLUTION would be appreciated.
Thanks in advance
Tec

Still hoping for any reply.
Tec

Reindex with just 2 levels

Thanks for your bulky assumption. I suppose you mean the indexing depth. But this doesn't change anything. The indexing depth does not influence the Suggestion Framework. Meanwhile I got the result by using utf8_bin collation for database.
Tec

Congratulations