# Change to Tag-Filename validation? **URL:** https://community.mp3tag.de/t/change-to-tag-filename-validation/8938 **Category:** Support **Created:** [September 12, 2009, 11:45pm UTC](https://community.mp3tag.de/t/change-to-tag-filename-validation/8938 "2009-09-12T23:45:33Z") **Posts on this page:** 4 **Page:** 1
### Author: ![chrisjj](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/c/a698b9/32.png) [@chrisjj](https://community.mp3tag.de/u/chrisjj) #### Post date: [September 12, 2009, 11:45pm UTC](https://community.mp3tag.de/t/change-to-tag-filename-validation/8938/1 "2009-09-12T23:45:33Z")
Has there been a recent change to the behaviour of Tag - Filename w.r.t. filename-disallowed characters in placeholders? Because this shows it doing one thing to a placeholder value and something different to the literal equivalent: ![](http://img27.imageshack.us/img27/1153/capturedd.png) I didn't think this happened in some earlier version, and surely it is undesirable. ---
### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian) #### Post date: [September 13, 2009, 5:57pm UTC](https://community.mp3tag.de/t/change-to-tag-filename-validation/8938/2 "2009-09-13T17:57:24Z")
This definitely needs to be consistent. Thanks for pointing! ---
### Author: ![chrisjj](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/c/a698b9/32.png) [@chrisjj](https://community.mp3tag.de/u/chrisjj) #### Post date: [September 13, 2009, 6:47pm UTC](https://community.mp3tag.de/t/change-to-tag-filename-validation/8938/3 "2009-09-13T18:47:39Z")
OK, I guess this is a change, perhaps from [[F] $validate() broken?](https://community.mp3tag.de/t/8311/11) . Florian, I can see any fix is going to be potentially problematic since it will break compatibility of some usages. Personally, I would like the inconsistency be fixed and the fix be in favour of the %_length% case i.e. invalid chars be replaced by "_", this being a change to the behavour in e.g. the case of the literal "02:13", previously replaced by "02:13" now to be replaced by "02\_13". It seems to me as if this means the results would be identical as from $validate(,"_"), but for avoidance of doubt I would like the result to be defined as identical as from $validate(,"_") i.e. replaces all /?\*"\<\>|: with \_ . But please if any other users will suffer from the incompatibility, please do say what you prefer. I am sure Florian will listen, as always! ---
### Author: ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system) #### Post date: [February 9, 2026, 12:21pm UTC](https://community.mp3tag.de/t/change-to-tag-filename-validation/8938/4 "2026-02-09T12:21:47Z")