The above is wrong. After further investigation it seems that is the use of an ampersand chartacter in the list field that is causing this problem. Is that invalid character to use or dis this still class as a bug?

Still a bug. I fixed this sometime ago with a private patch. I'll add it here for the mantisbt 1.2.3 branch

I believe there was an issue like this 2 years ago aswell allthough i can't remember the issue number

SL-Gundam , confusing to me, or maybe blind at the moment.

1.2.3 : contains $t_custom_field_value = string_attribute( $t_custom_field_value );

1.2.x : removed call of string_attribute , see 0003767 and http://git.mantisbt.org/?p=mantisbt.git;a=commitdiff;h=76c9a79ef7d88a135e226088c167e90065ef9277

Your Patch: adds the call of string_attribute but you write it's for 1.2.3
Or did you mean it's for 1.2.x ?

Thanks atrol, I think you're right in saying this was fixed with the changesets attached to 0003767.

Now I am even more confused

SL-Gundam adds one line to fix this issue 0011531
dhx removes the same line to fix another issue 0003767

Is this the game of patch ping pong?

Or just that simple, that some more changes together in 1.2.x will solve 0011531 and 0003767 .
If yes, SL-Gundam's patch is not needed or even better is removed (at least if we push out 1.2.4 in near future)

My patch was meant for the 1.2.x branch.

But i think 0003767 is a better solution for the same problem. So please ignore my patch

Thanks for the feedback